swapping my blown 700 for a th350.does the driveshaft or crossmember need to be modified? does 4speed shifter still work in 3 speed. Any help or tips appreiciated

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84 Z28
78,000 miles
1970 350 ci 4 bolt chevy motor punched .030 over to a 355
stock 1970 heads with 1.94's and very mild porting
edelbrock rpm cam,intake, 750 4barrel
weisco 9.6/1 pistons & rings
edelbrock headers and catback (without the cat)
700r4 trans
3.23 rear (no posi yet)

 

https://www.thirdgen.org/messgboard/...ML/003779.html

 

The 700-r4 shifter will work. Use the drive
shaft and crossmember from an '82 or'83
Camaro with a 200 Metric transmission. You
will need a B&M torque arm mount kit. Jeg's
or Summit should have it for about $80.00.
The downside to this swap is the loss of overdrive. Rpm's in 3rd with 3.73's at 65 mph is about 3000.

 

Another option if you have to build a th350 is get a 9in tailshaft version, its close enough to the 700 that your current DS will work. If you have any other ? just ask, I'e been there done that.
Later
John

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82 Firebird,408,Dart Iron Eagle 215's,Cam 229/239, .498/.520,TH350 Tranny, 750 Speed Demon carb, Hooker Headers(I.E. POS) Manual steering, Bfg DR's.
Check out my birds new home.
Best et 8.21 @84mph in the 1/8th

 

It's pretty easy. If you have the TH350 with the long tail shaft it'll be a piece of cake. Just take the shifter lever off the 700 and put it on for the 350 and the shifter cable bracket will bolt on to the tranny but one end will rest on top of one of the bolts. Still works though. Then you need the torque arm bracket from Summit. Piece of cake.

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1986 SC Camaro
Mods: Threw 2.8 in garbage, put in rebuilt
350 .060 over, XE268H Comp cam, Edlebrock
Performer Intake and Edlebrock 600 CFM Carb,
Pete Jackson noisy GearDrive (which sounded
cool for about 5 minutes, now I'm sick of it)
Rebuilt TH350, 3.42 Rear Gears. LCA RLB's.
B&M Mega Shifter.

[This message has been edited by bhaas (edited July 12, 2001).]