SM Head Modifications on a budget

PRH said

Shortly after these RPM copies came on the scene someone sent me one to see if there was any “low hanging fruit” for big gains in flow.

It was several years ago, but I remember my takeaway being, after the valve job and blow blend/SSR tweak are done……. which gets you into the 260’s……..that you have do some meaningful actual “porting” to get much past that point.

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The exhaust side is so easy to make some fast unbelievable gains. Maybe not so much in flow but performance. 220 cfm on that side is probably a good job. One of these days I’m going to grab a head and just give in a nice performance valve job for a 2.02 valve, 30 degree backcut, 15 degree chamber cut, and spend a fair amount of time on the short side. Then do up the pinch and bolt bulge. I won’t touch the roof or floor except to blend the work I do on the short side.