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yes, the 350 heads will bolt and work on the 283,,,but depending on what casting number and what CC they are they may lower you compression ratio. and yes, the 350 harmonic balancer will go on....expect you do not have the retainer bolt on the end of the 283 crank. anything bigger than what you have would scare me.hese heads are made FOR a 283 and will Yeild in the 10-10.5 to 1 compression. I would stay away from all late model heads personally. Your deal is NOT a Nightmare, Just run a Stock 283 Dampner..
Because of the 305's small bore, you're pretty limited. Large valve heads (2.02/1.60) won't work on a 305 because the valves will hit the block itself. If it's an older 305, y â¦ our best bet would be the old power pack 283 heads.They flow better than the older 305 heads. Now, if it's a vortec engine, you probably won't do much better than what it had stock.he 283 used 64cc combustion chambers and the 305 used 76 cc, so you are going to probably have to go to the nest higher octane gas. You'd be better off getting some dime-a-dozen 305 heads from a wrecking yard. A word of warning. Don't try to use heads with 2.02/1.60 valves from a 327 or a 350 on a 283 or a 305.