Thread: 283 or 305 heads???

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I have two sets of heads they are
283 heads casting #3795896 60cc or
305 H.O heads #14022601 58cc

i was woundering what heads are better or would make more power? they are both getting bigger valves and ported but one set is goin on my camaro and one set is goin on my motor for my demolition derby car and i want to use the better ones on my camaro....

What yr Camaro??.Don't think 283's have the holes on the end of them for the alt,power steering,etc.

BTW-what size engines??.

Lots of fellows still believe it is economical to rebuild these OEM cast iron heads. I disagree.

Boil 'em out to clean 'em
Magnaflux for cracks
New valve guides
New valves
New springs, retainers, keepers.
New guide seals
Valve job
Take a cut on the surfaces to true 'em up
Pull pressed in studs
Cut stud bosses for guide plates
Tap for screw-in studs
Install guide plates
Install hard seats in older heads (pre-70's)
No accessory bolt holes in older heads
Porting

And now, you have all this money tied up in old technology, plus, if the heads were not ported by a professional who knows what he is doing, they could end up flowing worse than they did stock.

Nawwww, save up a few more Shekels and buy a new set, ready to go out of the box with proven performance from state-of-the-art technology.

Originally Posted by techinspector1

Lots of fellows still believe it is economical to rebuild these OEM cast iron heads. I disagree.

Boil 'em out to clean 'em
Magnaflux for cracks
New valve guides
New valves
New springs, retainers, keepers.
New guide seals
Valve job
Take a cut on the surfaces to true 'em up
Pull pressed in studs
Cut stud bosses for guide plates
Tap for screw-in studs
Install guide plates
Install hard seats in older heads (pre-70's)
No accessory bolt holes in older heads
Porting

And now, you have all this money tied up in old technology, plus, if the heads were not ported by a professional who knows what he is doing, they could end up flowing worse than they did stock.

Nawwww, save up a few more Shekels and buy a new set, ready to go out of the box with proven performance from state-of-the-art technology.

X2 from here

X3 from here, too!