5 speed transmissions

[Johnny walnuts]

I am wanting to swap out my 3 speed automatic and stock 2.73 gears fora good reliable 5 speed manual and 3.73 gears.  I will end up having about 400 horsepower out of my small block and want to know what can handle that kind of power without blowing all kinds of cash on a T56 Tremec.  Any suggestions?

[Engineer]

NVG4500.

I doubt the NVG3500 will hold up to 400HP long term.

[Johnny walnuts]

What is the best place to find one?  looking to do it on the cheap

[Johnny walnuts]

Ok, so I found what vehicles carried the nv4500, but what else would I need to make the swap?  obviously I would need the pedals and bell housing from any manual C10 correct?  What about a clutch setup, could I go with a hydraulic clutch instead of the mechanical?

[zieg85]

You will have to do some surgery to the hump of the cab.  I've been told there isn't enough clearance in a low auto hump cab.

[Johnny walnuts]

Yea, thanks.  I was actually just reading your thread about that.  I can handle that

[Irish_Alley]

it also depends on what year 4500 you get for the clutch

[DnStClr]

A video on You tube from an auto to an SM465-
http://www.youtube.com/watch?v=5LERy3yrTdA

[Johnny walnuts]

DnStClr, thank you very much.  That video helped a lot.   so I will need a bell housing and a hydraulic clutch assembly from a  sm465 and that should bolt right up to my 350 now correct?  Then I will need to locate a nv4500 , cut a hole in the firewall for the master cylinder, bolt in the pedal assembly, cut up the floor for the new transmission, and make a new trans tunnel.   sounds pretty straight forward.

[DnStClr]

People who've done the swap say you'll have to watch the bellhousing you use- even tho the bolt pattern will be common between the TH350 and SM465, the clearance hole for an SM465 would be smaller than needed for the NV4500, and you'd need to get it machined to a bigger diameter. It wouldn't be too expensive. Just need to be aware of the difference.
 Here's another good link-Parts-
http://www.high-impact.net/transmission_and_gear/nv4500_gm82-93diesel.htm#Automatic

[Irish_Alley]

http://forum.73-87chevytrucks.com/smforum/index.php?topic=13884.0
http://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=863180&page=all