Small Valve AL Heads

rumblefish360 said
Edelbrock w/2.08/1.60 valves. This is as close as I could get with what I had on hand.

View attachment 1715247568

Thanks Rob... that is actually not looking all that bad...boy, there ain't much gap between intake and exhaust with that larger valve! I am sure there will be some bore offset versus valve positions to deal with.... but the notching option is not looking awful. (Famous last words....)

JBurch said
Another idea......off center bore the cylinders to favor intake clearance

And I appreciate the ideas JB. The block wall thicknesses came out pretty even all around for this particular 273 block, and after a .027" bore, the thinnest spot on the pin axis would be around .150"....so some offset might be possible.

I am not a machinist so don't know how easy/hard offsetting the valve guides would be. I assume the seats would follow the guide locations more easily. I have plenty of compression to afford 1-2 cc's in notching.