L36 heads/intake, what are they worth ?

[Too Many Projects]

Originally Posted by WILMASBOYL78

The 063 heads are great platform for a mild street motor...with some larger valves and some minor massaging they will make good power. Some folks call them a semi-open chamber design...very similar to the later 290 heads.
-wilma

Bigger valves... these have 2.19 intake 1.88 exhaust. From what I read, that is the bigger size ?

[WILMASBOYL78]

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 ?

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

[Too Many Projects]

I was reading conflicting info on the www. Some referenced the 427 heads as having the larger valves, while the 396 got the smaller ones. My heads are on the block and I haven't actually checked them, but I will guess they are the smaller valves.

[WILMASBOYL78]

Originally Posted by Too Many Projects

I was reading conflicting info on the www. Some referenced the 427 heads as having the larger valves, while the 396 got the smaller ones. My heads are on the block and I haven't actually checked them, but I will guess they are the smaller valves.

The low horse 396 and 427 motors both used the same heads...the hi-perf versions had heads with larger valves and different ports/chambers.

Lots of incorrect info on the web...

-wilma