73-87 Chevy _ GMC Trucks > Wheels & Tires

th350 to 700r4

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bigblock73:
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?

bigblock73:
whoops, wrong section.  I can't figure out how to move it so I'll re-post it to the general section.

blazer1961:
should bolt right in.

abig84:
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

73K20:
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

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