Quote:
Originally Posted by Too Many Projects
Bigger valves... these have 2.19 intake 1.88 exhaust. From what I read, that is the bigger size ?
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The factory 063 heads had 1.72 exhaust valves and 2.06 intake valves...it is possible your heads had some work done and the larger valves were installed. The oval port big block heads respond well to mild porting and improvements to the exhaust side of the program. The 2.19 and 1.88 valves were stock on the 291 big port heads in 1970...installing these in big block heads is a common upgrade.
-wilma