Has anybody done this conversion to a mid seventies K5, or K15? 1976 GMC with a 400/th350/np203 Would like to put a 700r4 in the vehicle, but I also figured to scrap the np203, for a np 208, or possibly np241. Would drive shaft alignments be off on with the 700r4/np208, or 241? Would I need new drive shafts, or would I need to shorten, or lengthen the drive shafts I have now? Crossmember: would this be an issue? Is there an article out on this project?