Cracked head- pic

I had the same crack, used it as an excuse to get a 5.5 head back in 2015. 4 years later the engine needed a babbit job. Rebuilder said it would have needed it either way though. With a known good bottom end 6:1 is a no brainer.
 
Russ/40 said:
IMO, you'd be nuts to buy the 5.5 when the 6 is the same price. I agree with the few above, that your head is usable. But, with the opportunity the head being off, I'd go for the 6:1 head. Yours is a good candidate to be one with weeping problems. Your water holes show a lot of rust.
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Ditto. Potential problems from the cracks.
 
This may go without saying, but less spark advance (timing) is needed with a higher compression head. If a person runs with the timing lever in the same position as before, he will pound out the Babbitt from detonation.
 
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Its a direct copy of the Winfield red head,cc's out with a bored over engine at 7.9 to 1..contact him for pricing and availability.
 
UPDATE:
Have a new cam on the way, manifold, lifters, guides, gaskets, head, head bolts and a lot of related items all here. Oil pump is done and ready to go.
What should have been a quick head gasket and adjust valves job has turned into all this...
 

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Everyone seems so excited about the high compression heads. If you don't have a lot of hills to climb, why to you need them. I have had two of these original "B" high compression heads and both of them ended up having leaking head gaskets. I would guess that they also put more stress on your rod bearings. I often ask, how fast do you really want to go in a Model A? I know, I am the white haired guy holding up traffic! Ed
 
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