56 inch omc. 1986 block. looking for 150 + or - psi compression. What do I need to cut the pocket depth on the head to??
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56 inch omc. 1986 block. looking for 150 + or - psi compression. What do I need to cut the pocket depth on the head to??
New toy. Allison 13R .56 in motor on 15" mid with nitro case and lwp.
the std sst60 will get you close
spec is on the apba site
Exhaust relief holes will lower that if not plugged
Thank you!!