Threaded View
-
08-20-2014 05:03 PM #1
Need Help Identifing Small Block Cylinder Heads
Hello, I have a set of High Performance Cylinder Heads off an older Chevy 350 engine. On the side of the heads near the bottom says Bill Mitchell and there is a stamping that has the numbers 378. On the heads their is the numbers 11 21 between the springs. They are angle plug heads. Any other info would be great.[IMG][/IMG]
[IMG][/IMG]
[IMG][/IMG]
[IMG][/IMG]
[IMG][/IMG]
I wonder if air could be trapped in there, maybe more run time would purge it out.
New guy from Utah.