Re: Diesel to gas reversion
Myself, I would not waste time and money on the 305, just go with a bigger V6. I pulled the 305 out of my 68 K2500 and replaced it with a 478M V6. Putting a 3.86 stroke in a 305 will require custom pistons, the longer stroke will make the pistons travel slightly above the bore, some say you can have the stock pistons machined down. You want a stroker V6 GMC made a 379 from 1973-74, basically a 351 with a 478 crankshaft. Same thing with the 432, a 401 with a 478 crankshaft.
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