nv4500 AA conversion questions

[bigjohn80]

Hey folks, i have a 71 k10 lwb 350/th-350/10 spline 205 t-case, 4" lift 35" tires. I am planning for a nv4500 swap this summer. I have found a lot of useful info through the search, although i still have a few questions. I have been looking into the AA conversion kit but i was wondering if i use the adapter for my original tcase will my driveshaft lengths need to be changed? Will i need a different trans tunnel hump? They have a bellhousing that allows use of an original mechanical clutch and one for a hydraulic setup, what are the pros and cons to mechanical versus hydraulic. Which t cases are simple bolt on options and if there are any will my driveshafts hook up and if not do they make adapters for this. This is my first chevy, and I must admit I am enjoying the old truck. I intend to completely replace the drive train in this truck the nv 4500, 1 ton axles with 4.10's and the old engine is gettin pretty tired its a 350 stock with double hump heads if any of yal fellas got ideas on a good direction to go with this engine lemme know.

thanks
Big John

[DirtyLarry]

Originally Posted by bigjohn80

Hey folks, i have a 71 k10 lwb 350/th-350/10 spline 205 t-case, 4" lift 35" tires. I am planning for a nv4500 swap this summer. I have found a lot of useful info through the search, although i still have a few questions. I have been looking into the AA conversion kit but i was wondering if i use the adapter for my original tcase will my driveshaft lengths need to be changed? Will i need a different trans tunnel hump? They have a bellhousing that allows use of an original mechanical clutch and one for a hydraulic setup, what are the pros and cons to mechanical versus hydraulic. Which t cases are simple bolt on options and if there are any will my driveshafts hook up and if not do they make adapters for this. This is my first chevy, and I must admit I am enjoying the old truck. I intend to completely replace the drive train in this truck the nv 4500, 1 ton axles with 4.10's and the old engine is gettin pretty tired its a 350 stock with double hump heads if any of yal fellas got ideas on a good direction to go with this engine lemme know.

thanks
Big John

Welcome to the site Big John,

I am in the middle of this same swap but on a '78 K10.

1) Yes, if you use AA kit 27-0031 (27 spline 205 to NV4500….same kit I am using) you will need to shorten the rear shaft and lengthen the front shaft.
2) No, you can rework your TH350 hump to work. In fact, I used a TH350 hump so I could cut in the shifter tower hole instead of plug the SM465 hole and make a new hole.
3) Mechanical or Hydraulic… that is is entirely up to you. Mechanical will be much more simple to deal with during the NV4500 swap. I chose to go the route of upgrading to a hydraulic clutch
4) Simple tcase bolt ons… There are several that are simple to bolt on. A RH front output NP241 bolts right on and a round pattern 205 from a 1985 or later GM truck is almost a bolt on job.

Here is a link to my project that is still in the works.

http://67-72chevytrucks.com/vboard/s...d.php?t=431033

[msgross]

Plan on new driveshafts...