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Originally Posted by trigger piston
I got a 300 6 cylinder and Iwant it to scream I was wondering If you could put a 250 crankshaft in a 300 6 cylinder because the 250 got a built proof bottem end. and does any body know about the cut up 351 custom head you can put on it.
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Other way around, the 300 has the bullet proof bottom end with a fully counter-weighted forged crank, meatier rods, and thicker block castings. The 240 is a cast crank, light rods and thin wall cast block.
The 302/351 heads are a race only mod. The never solved, seldom mentioned problem is coolant leakage at the join points. While a race engine will stay dry enough for an afternoon, this isn't something you do on a commuter car.
Bogie