I drug home a 69 3/4 ton gmc pickup with a 305 cubic inch V6 and 4 speed manual. The body is junk so I stripped that off, and now I have a good HD frame. I started it up yesterday and it seemed to run good. (loud as hell tho!) I didn't run it long due to lack of a radiator. Then I got this idea to slap the '50 chevy body I have laying in the mud on that frame and make an actual HD pickup out of it. My only dilemma is the width of the axles compared with stock, but I think I can fix that with about a 2" body lift and some dually rims(it has 8 lug axles)
After talking myself into the first part I suddenly recalled seeing a 401 cubic inch Gmc V6 Magnum with a broken crank, but the magnum heads are supposed to be the best flowing of all the jimmy sixes. So If I drop those heads on the 305E (giving it a whimpy 7.50:1 CR) and fab up a set of headers to go over the valve covers and straight into a...Holset HY35 off a 5.9L cummins and run a draw thru setup with about 5#'s boost on the stock bottom end I shouldn't hurt anything... Right? Maybe Tom or another turbo guru will reply and point out some potential problems. I'd run all the safety goodies, like a bov, wastegate, and possibly a MSD BTM. I've also read into adapting a buick even fire V6 HEI to replace the stock points. It's original design was a low rpm torque monster, much like the inline sixes, so I'd keep it under 4000 rpm max, usually no more than 3500 anyways.
the stock piston had a 4 ring design, which i'd think would be good for boost?
I'd of course drop the pan and at least check the bearings and use a bore snake and check out the cylinder walls and pistons. a compression test and leak down test would also be in order.
check out http://www.6066gmcguy.org/EngineData.htm
After talking myself into the first part I suddenly recalled seeing a 401 cubic inch Gmc V6 Magnum with a broken crank, but the magnum heads are supposed to be the best flowing of all the jimmy sixes. So If I drop those heads on the 305E (giving it a whimpy 7.50:1 CR) and fab up a set of headers to go over the valve covers and straight into a...Holset HY35 off a 5.9L cummins and run a draw thru setup with about 5#'s boost on the stock bottom end I shouldn't hurt anything... Right? Maybe Tom or another turbo guru will reply and point out some potential problems. I'd run all the safety goodies, like a bov, wastegate, and possibly a MSD BTM. I've also read into adapting a buick even fire V6 HEI to replace the stock points. It's original design was a low rpm torque monster, much like the inline sixes, so I'd keep it under 4000 rpm max, usually no more than 3500 anyways.
the stock piston had a 4 ring design, which i'd think would be good for boost?
I'd of course drop the pan and at least check the bearings and use a bore snake and check out the cylinder walls and pistons. a compression test and leak down test would also be in order.
check out http://www.6066gmcguy.org/EngineData.htm