View Full Version : New member new 1966 project

06-24-2014, 02:14 AM
Hey guys reaching out to you all for help just picked up clean 66 c20 camper special it has original 327 with 4 on floor 1st gear granny etc I'm looking to help out my top speed a bit looking to make this truck more of a cruiser than a stump puller... Not sure best next step ...... Swap out rear geAring for like 3.73's or swap for newer T5 type 5 speed trans or both etc.....,? Looking for any good help to move forward thx guys next I'll try to tackle front disc coversion !!!

06-24-2014, 02:16 AM
Here pic of the new beast

06-24-2014, 02:17 AM
Pic of the motor

06-24-2014, 08:22 AM

The T5 overdrive would be the best option. That way you still have good pep driving around town but get good mileage on the highway.

06-24-2014, 09:45 AM
So the T5 would be enough without swapping the rear end ratio's...? And from what I can find it seems like the T5 should fit well with an adapter plate an drive shaft modification .....? Thx for the help

Rich 5150 69
06-24-2014, 10:30 AM
You might also look at the NP-440 transmission, came in the GMC and dodge trucks actually a three speed with fourth being the overdrive they used them from 1977 to `86, the RPO on them was MY-6, the ones used in the dodge where the same other that the bell housing you can`t use, the trans came in cast iron and aluminum....quite a bit stronger than the T-5...http://www.bangshift.com/forum/forum/bangshift/tech-section/18841-a833-manual-transmission-question/page2

06-24-2014, 02:17 PM
Ok so I think I have a plan I'm going this weekend and having a buddy's shop help me swap out the rear gears and put in 3.73 that should get me by for a bit while I track down a nice t5 I'm also looking to swap out the front drums for disc hear the 73-87 3/4 ton truck or suburban will swap in... But not sure the exact details or parts that will swap any thoughts..?

06-24-2014, 06:28 PM
Welcome aboard... :wave2:

Don't forget you can get some changes out of tires and wheels. You didn't mention what gearing you have now.

A transmission or overdrive setup will really make a lot of difference though. Good luck on the outcome and again, Welcome! :wave2:

06-24-2014, 09:47 PM
One of my friends had a 66 C20 camper special when we were in high school. If I remember correctly that 327 used in camper specials was also one of the ones used in the "vetts that year. Hydraulic cam higher preformance with a 4 bbl. Probably the 325 hp, if my memory is right. As far as your questions, is this a budget build or ......?

06-24-2014, 11:33 PM
I believe it's 4.11 in rear but I'm not 100% on than all I know is at 65 I'm running close to 3700 rpm's and as far as tires those are a must replace the previous owner thru set off his newer truck so they are 285/75/16 too big in my opinion think I'll go to 265 or so and yes it's kind of a budget build I'm looking to put another $5k into the truck with paint rear end disc conversion and vintage air system since I'm here in az and sorry it's a must!! But one step at a time since I like to drive truck if I do too much at once I'm afraid it will be parked more than id like lol

06-25-2014, 08:31 AM
As discussed above you can use tire diameter to tame down the higher ratio rear end ratio, and going to smaller diameter tires would be the wrong thing to do.

This chart shows that. It is based on running 65 mph with a 1.0 trans ratio (high gear, non overdrive type transmission).

http://i645.photobucket.com/albums/uu176/lakeroadster/Engine%20and%20Driveline%20Technical%20Data/EngineRPM-GearRatio-TireDiameter_zps98cc0d77.jpg (http://s645.photobucket.com/user/lakeroadster/media/Engine%20and%20Driveline%20Technical%20Data/EngineRPM-GearRatio-TireDiameter_zps98cc0d77.jpg.html)

But if the tires get too big in diameter that can be an issue if your transmission gearing isn't correct. That shouldn't be an issue for you since you have granny gear.

My truck has a M-21 passenger car 4 -speed, a 3.73:1 rear gear and 33" dia. rear tires. You have to slip the clutch a bit to get it moving but it 2468 rpm at 65 mph. That's why a 5 speed is great. You can keep your 4.11 gear, have great around town performance, and still get lower cruising rpm's on the highway.

06-26-2014, 02:22 PM
Welcome to the forum, and good luck with your choices. Had I known about that NP-440 back when, I might have opted for one of those instead of the Super T10 I went with.

06-26-2014, 04:47 PM
Thx guys going to local diff shop this next week since wife says clean house before I get to work in the garage...? Oh well gonna have 3.73 put in rear see how she rolls I also ordered 1inch front drop coils and 3 inch rear coils guess I better hurry and get some wheels and new rubber picked crap does the list ever end on these lol it's fun but I don't ever think I'll run out of fun stuff to add... Oh I also was just gifted 3/4 ton front end out of a 83 suburban so I'll attempt to so the disc swap in next few months ..:eek:

Az Geezer
06-26-2014, 07:11 PM
Hey, Sandfreak...........where you located in AZ?
Let's bug Jack (OldBlue66) to post up picks of his on the cheap AC install...........if he pulls this off like I think he will, you all will be kicking yourselves for not having AC this cheap.............

Rich 5150 69
06-27-2014, 11:05 AM
Sandfreak you can also use the jepp ax-15 trans from any 2 wheel drive jeep, they are also 5 speed, used between `88 to `99 in jeep and dakotas, use the apater or bell housing from Novak enterprises, its stronger than the standard t5 just another alternative..

06-30-2014, 03:58 PM
Az geezer I'm in Tucson yea any help with the AC would be amazing I asked a customer of mind who owns an AC shop here in town and his "buddy hook up price " was a cheap $2600 to install vintage AC kit I said he was nuts an declined the "hook up " since kits are only 11-1200 bucks! And rich I will look into that I'm gonna try the 3.73 for a little bit see how I like them with the factory 4 speed..... But it is difficult with the seat I have in the truck if the shifter needs to move too far I have the super comfy 2002 dodge fullsize bench with console I'll post a pic. Again thx you guys have been more than helpful you guys rock!

06-30-2014, 04:02 PM
Here is the seat I have as it is when I throw in reverse it hits the seat.

06-30-2014, 04:04 PM
Oops crap let me fix that sorry

06-30-2014, 04:15 PM
Sorry here the photo of the seat right side up I hope lol

Az Geezer
06-30-2014, 05:39 PM
I've got 4:10's in my C30 Longhorn. I've got a 3:54 geared Dana 60 that I'll someday put in my truck. I've got a 700R4 already in, but I think the 4:10's are what makes it shift to second gear by about 5 mph. I think the 3:54 will keep it in first a little longer, and I'll do better on the highway, where my truck spends a lot of it's time.
I've got 3:73's in my 86 Monte Carlo SS, and I'd prefer a set of 3:42, like the Grand National had. I've installed 3:42's in the 10 bolt in the 56 Chevy I'm doing for that reason. The 56 has a 350/700R4.
Of course, a lot of this has to do with tire size, too.

06-30-2014, 07:56 PM
Mine is going to be a cruiser plan on trips to Phoenix showlow etc maybe even Vegas with the wife after gear change and AC of coarse lol. I do want to be able to have fun with truck as well I'm planning on keeping the 16 inch wheels I have and get them powder coated but tire size I'm not sure....... What I'll put on it since it will be doing 2inch drop springs in front and 3-4maybe 4inch rear drop.....??nothing drastic just little lower is all:grin:

Az Geezer
07-01-2014, 08:57 AM
So, you'll be going to Goodguys in November?
Bonnie and I do a show in Laughlin every September called "Roddin' on the River". This year is the 23rd year. We've been to every one.
Do you know how to powdercoat? If not, I can teach you. I can do 16 inch wheels in the oven in my shop. I've got the Eastwood kit. Depending on color, you might have to buy the powder, if I don't have it.
You need to see Jack's truck in person, and check out his drop and tire sizes.

07-01-2014, 02:47 PM
Thx Geezer ill have to go check his out and see im thinking a gunmetal grey powdercoat since im going to paint the truck the new 2014 mustang bright green with the factory white roof and stripe white as well. Think a darker wheel vs a chrome one would look much better and had not been to the show in november but if i can get my ish togther and get some stuff done to the truck in time may be an option....?

Az Geezer
07-01-2014, 03:07 PM
Or, ride with one of us............