3 spd to 4spd

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Apr 9, 2004 | 03:40 PM

camperspecial65

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Joined: Mar 2004

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From: seattle

3 spd to 4spd

I am contemplating doing this swap to a NP435, questions I just wanna run by the great group we got here is this...Is the bellhsg between the 2 the same ? Is the tunnel gonna be an issue (am I gonna need the tunnel cover off a np435 rig) and is the driveshaft yoke gonna be an issue....its a 1/2 ton column shift that was mickey moused to a poor mans floor shift....I like the 4 spd I got in my 65 which is why I am going with the 435....crossmember differences between the 2 or ????

I am open to pointers/tips to look out for.....

thanks, camperspecial65

BTW, both are FE motors...352 of course....

Apr 9, 2004 | 09:45 PM

cdherman

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Joined: Jun 2003

Posts: 1,218

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From: Parkville, MO (KC)

Don't know about the bell housing. You will need the higher hump -- any 8" from 65 to 72 will do the trick. That is -- you are running two 65's right? Hump changed in the trucks with twin Ibeam suspension.

The other good tranny if you like the NP would be a T-18. But the reverse is different, so if you have two trucks, maybe the NP is the better way to go, to avoid shifting snafus.

I don't know about cross member either. Hopefully you'll get some more input.