Quote:

Quote:

Milling .065 off a J head and pocket porting the intake with a good valve job ,you will need to cut the intake side too, turns Js into quench head , A lot cheeper than eddies , similar results



I have a set of ported J heads, they flow in the low 260s on the intake, good valve job, milled .070. If they have any quench it's very little. My hydraulic cammed 340 went from 10.3-1 compression ratio and ran a best of 7.60 (1/8) with the iron heads to
11.2-1 with ported Edelbrocks and a best of 7.24 and lost almost 50# off the front end. I'll take the Edelbrocks over 40 year iron castings any time.



I don't like iron heads and will always take aluminum for a couple of reasons. I really don't know why anyone makes iron heads any more. The OEM now uses aluminum almost exclusively.