1.84 valves in a 350

[Footjoy]

Hey
My friend is looking at a 350 engine rebuilt .020 with dished pistons. It has 305 heads with 1.84 intake and 1.5 exhaust valves. The complete motor is fresh. He can buy it for 1,000.00.

Machinist has great reputation, a honest guy.

I am just not sure about the heads. Machinists says he has done it 3-4 times before and it was a great combo.

What do you guys think?

[68Formula]

Buy it and slap on the new Dart Platinum Cylinderheads.

[Johnny Blaze]

305 heads are junk. Small ports small valves.

If he just wants a good groecery getter it may be fine. But if he wants to make any kind of hp, I'd pass.

[slowcamaro]

305 heads are decent in the right application. Especially in the aluminum variety. Theyre decent do to the fact its a simple way to raise compression.

If you build a 350 knowing that its not going to rev very high you can make them work...A home port job and oversized backcut valves can make up for some of the flaws.

[chicane67]

305's are good for 305's... not a 350...

[MonzaRacer]

actually for low rpm high compression heads they do work BUT wont breath over 4k rpm with any good results.
Aso its a premium fuel bi%^h.
IF it has forged pistons and machinist has good rep sell them to someone with a 283/307. They will make good compression on those and not detonate and I would get a set of modded Vortecs. I cna source them ready for $375 ea done. and they are ready for either .525 or .550 lift cams, would have to check.
The vortecs would make an easy 100 hp/torque more depending on the cam selected.
If its a cast piston engine, pass unless its going in work truck or something but not a street car.
Good Luck and ask if you want heads. price stands till my cost changes.
Lee Abel
AFTERMARKET PERFORMANCE

[Johnny Blaze]

The poor flow, or lack of flow from 305 heads will negate any power gains from the increase in compression.

They are junk and have no buisness being on a performance build.

[MonzaRacer]

Nothing wrong with high compression 305 heads but not on a 350. Use them on a 307 and it screams.
And actually for a small cube engine head they DO flow good, but not enough for a 350 and they make way too much compression with 58 cc chambers.