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I`m building a 455 for my airboat and wanted some advise on witch block would be better to use with my 70 heads. I have a 70 block that spun a main bearing and I have a 72 double scallop block that has rusty cyls.I`ve read that you have to block off a water port to use these heads on the newer...

I`m running a 68 430 on my airboat. I had an oil pump problem and the distributor drive gear and the distributor gear ate each other. I have to buy a new cam and want to know if I can get a little more out of it. The cam is a crower It has a 464 lift and 270 degree duration on the intake and 488...