Quote:
Originally Posted by wrenchnone
Thank you Mike, the GM number is 3994028 (or 26) date code 1-9-71 and 1-2 -71 The Mondello serial # is 19572. They are 117 cc Open Chamber, Ported and Polished by Joe Mondello, Valves are Manly stainless steel 2 1/4" intake, 1 7/8 exhaust, with spring pockets cut for 1.625" springs (can use std GM springs with cups). Has ARP rocker studs with push rod guides.
Titanium retainers. K Motion springs with 40 runs. Complete valve job / guide service within 40 runs. Leak checked and ready to run. Pictures on request. Probably something I'm forgetting but this should give you the idea of what I've got. Thanks for the help, John
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Wrench…That cylinder head casting number should be 3994026 they will be a Rectangle Port head and would have been from a 1971 LS6 offered in a Chevelle or Corvette. You might want try and sell them as such. Hope this helps. MB.