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73-87 Chevy _ GMC Trucks => Wheels & Tires => Topic started by: bigblock73 on September 28, 2001, 11:55:00 am

Title: th350 to 700r4
Post by: bigblock73 on September 28, 2001, 11:55:00 am

Does anyone or has anyone done this swap?  I am going to put in an overdrive trans (haven't purchased it yet) in place of the th350 in my '73 2WD and was wondering if I need to purchase a crossmember from an overdrive equipped truck or can I just reposition mine and drill new holes in the frame?

Title: Re: th350 to 700r4
Post by: bigblock73 on September 28, 2001, 12:03:00 pm

whoops, wrong section.  I can't figure out how to move it so I'll re-post it to the general section.

Title: Re: th350 to 700r4
Post by: blazer1961 on February 03, 2003, 03:08:00 pm

should bolt right in.

Title: swap
Post by: abig84 on May 06, 2003, 06:20:00 pm

the 700r4 is a bit longer then the th350 so you may have driveshaft problems and if it was a 4x4 the adapter between the transfercase and trans would be different

Title: Re: swap
Post by: 73K20 on May 07, 2003, 07:03:00 am

The adapters are the same between the tranny and t-case.  Both the TH350 and the 700R4 have 27 spline output shafts so there is no problem there either.  I think that you should be able to get by in using your old driveshafts too.

1973 K20 - 350/350/205