[steve c]

Thanks for the info Ray about the Chevy trans swap now you have me thinking again about this. I think I need to speak to Advance Adapters again and try to explain the dimensions again because all the seem to be concerned with is the bell housing depth not the actual depth from the pilot to the face of bell. The Chevy bell is 6-5/8" while the GMC V6 bell is over 8" that's why I gave them the other dimensions but they didn't take into account that the crank protrudes into the bell housing on the Chevy,knowing that dimension may be the answer . I will still have to modify the mounting holes for the trans to the adapter and bore out the bell housing but that's easy. I believe once I can get the correct dimension for the Chevy ( not the bell housing depth) it will end up being the same as what I measure on the GMC if its not and it wont work I will talk to Mel about another option which would be an SM465 with a Gear Venders overdrive. Thanks for all the help
Steve