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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: TxFiddler on May 01, 2011, 12:06:54 am

Title: TH350 to 700R4...Need info ASAP
Post by: TxFiddler on May 01, 2011, 12:06:54 am

So, going behind my 427 is a custom built 700R4.  I need to know exactly how far back I need to move the tranny crossmember.  I have heard 3 inches.  Is this correct?  Please chime in.  Need it for Sunday.
Thanks,
Fidd

Title: Re: TH350 to 700R4...Need info ASAP
Post by: Grim 82 on May 01, 2011, 01:48:51 am

I think your best bet would be to bolt it up to the motor, have the crossmember bolted on to the trans, and lift it up to the frame with a jack and then drill the holes in the frame. I wouldn't drill any holes in advance expecting them to line up. Just get it bolted up and see where the holes need to be and you should be good to go.

Title: Re: TH350 to 700R4...Need info ASAP
Post by: mach1mustang351 on May 02, 2011, 01:23:07 am

I just did mine (not a big block) but a T350 to 700r4 swap.  Mine is a 4x4 and I used the spacer type adapter.  I was able to put the front cross member bolt in the rear cross member bolt hole and drill only one new hole per side.