As much as i like flatheads i cannot keep old blocks going forever if the valve seats keep wearing away so... O.H.V. conversion, dustbowl style. So i gather from http://www.jalopyjournal.com/forum/showthread.php?t=177893 i will need a 25mm thick piece of metal. So the piece of steel or alloy will need threads in it for the cylinder head studs. But first this need to be bolted to the engine block right? For this i use countersunk machine screws in the block threads right? Am i on the right track here?. So now for the real puzzle. How do i drill the water passages? Please see in the pictures how far different they are. i gather i can drill some straight through the head gasket areas but others will not co-operate that way. Would i have to drill some water galleries in the adapter plate? Or router some in the adapter plate face? Those of you who have adapted cylinder heads will know these already but i am kinda new at this. Any helpful hints would be appreciated.
Thankyou for the response so far. i know of the thunderbolt conversion but i am a ...frugal person who likes to build it myself & the money for the conversion would buy a nice forged crankshaft. Guess i must be on the right track with those countersunk machine screws idea. Does anyone know how the water passages were done on the thunderbolt conversion? A picture would be nice.
I've got a 28 block with a 27 head on it. The block has been repaired from a crack years ago. I've been wondering about other options for the old motor. This sounds like a good idea.
he machines a grove (looks like a 3/8 dia end milled path about 1/8 deep) from one water outlet to the other kind of like a canal tk
Excellent. So maybe in a few months when i have some parts together i will let you know how it worked out.
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