I have a 1986 C20 with a 305 in it. I was wondering if a 292 out of a 76 1 ton would make a good replacement. I figure the six would be better on gas, run smoother, and should have as much torque and power as the gutless 305. I will of course be rebuilding the 292 and perhaps put a cam and 4bbl set-up on it. The truck has a granny four speed in it and I was wondering if the swap would be do-able without too much trouble. The 76 has the same trans.