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Originally Posted by RICK LAKE
Grubby John I think you really need to talk this over with Barry about your build. If you are running a top end Aluminum headed motor, iron block is not the way to go. You have 2 different materials that have both different strengths and most important, expansion rates. Almost every car built since the mid 80's has tryed this combo in both cars and truck, IT DOESN'T LAST. Head gaskets are rubbed until either outside leaks or internal leaks.
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I don´t think so. A lot of iron + aluminum combos are running trouble free all over the world. In germany - with no general highway speed limit - too. Take good head gaskets and you´re doing fine.
Keith Craft is building me a 468FE with Pond iron block, Stage-2 heads and solid flat tappet cam right now. As patrickt said: The shorter 4.125 stroke let the motor rev easier and piston speed is lower. OK, 482 has a bit more punch (especially torque), good for a cruiser, but with a cobra I will not cruise all the time and a 468 burns the tires too.
Just my -,02.
Greetings from germany, Stefan