Ckhd, what gears were you running? Seems to me your milage should show improvements as long as the engine wasn't bogging down.
At what RPM's does/did your engine spin in drive @ 35-40mph? You should have similar RPM's in O.D. Anything below & the engine is bogging. Also, the convertor shouldn't have a higher stall speed than that cruise RPM either.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....
Cubic inches is like Indiana Jones with a cheap pistol.
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