The 350 piston is made for a 3.48" stroke crankshaft, and will be about 1/4" too low on compression height. Back when the bored-out 283's were popular just about every hotrod shop had lots of partial piston sets from hand grenaded drag race engines- - - - -guess they all went to the aluminum recyclers years ago!

The "turbo" heads were only available over the counter at GM parts departments for racing purposes- - - -no heat riser passages and 64CC combustion chambers. They were never installed as OEM parts. We used a lot of them on Sportsman engines at the Nashville Fairgrounds 5/8 mile oval track in the late 1970's. Good stuff if you can find 'em!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!