Gen I to 700r4
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From: westchester ny
Car: 1990 TA
Engine: 350 in the works
Transmission: th700r
Axle/Gears: 10 bolt Eaton Posi 373
Gen I to 700r4
Will the 700r4 from my 90 T/A bolt up to a gen 1 383 ? I read somewhere that the crank flange lenght is different and you need some sort of adapter. Thanks for any help...
Joined: Apr 2005
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Gen I to 700r4
All SBC ( inc Gen II LTX ) engines have have the same bellhousing pattern
1 pce seal engines > '87 ( like your 90 ) have a different bolt pattern on the crank flange to the earlier 2 pce seal engines.
All you need is flexplate that matches your new engine
Last edited by vetteoz; Nov 1, 2011 at 11:10 PM.
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
If you use the stock induction/control system, the TCC lock-up won't be a problem.
Thread Starter
Junior Member
iTrader: (1)
Joined: Sep 2011
Posts: 16
Likes: 0
From: westchester ny
Car: 1990 TA
Engine: 350 in the works
Transmission: th700r
Axle/Gears: 10 bolt Eaton Posi 373
Re: Gen I to 700r4
I plan on retaining the lock up converter. The main reason for my question was that I read somewhere that the crankshaft flange lenght is different on the older chevy small blocks to the point where i might need a thin spacer mounted between the block and the trans to keep clearance between the converter and the trans.. IDK ? Thanks, Patrick.
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