mopar 516 heads

[moparjohnny]

would these work with 383 hi po eng,flat top pistons,solid cam,headers,750 carb,3.55 gears? thanks

 

[hotroddinwillie]

John,
In my experience with those 516s, visually I've seen no difference between the ports of the later cylinder heads. I've read they don't flow as well but I haven't seen flow bench data to back it up. The exhaust valve is small. A 1.74 can be accommodated. The chambers are nice and small so a 383 will have an easier time making compression with them with a lack of good off the shelf pistons.

 

[Cornpatch MO]

John,
In my experience with those 516s, visually I've seen no difference between the ports of the later cylinder heads. I've read they don't flow as well but I haven't seen flow bench data to back it up. The exhaust valve is small. A 1.74 can be accommodated. The chambers are nice and small so a 383 will have an easier time making compression with them with a lack of good off the shelf pistons.

I used 516 heads to replace open chambered 440 heads, flat tops down in the hole a little, and I used steel shim head gaskets--all to increase the comp. ratio. Up to 9.5 to one. I put in oversize exhaust valves with hardened seats. No port work, and I am very satisfied with that combo.
If your piston is not below deck height, you can probably go with a composit head gasket......................MO