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Old 12-20-2002, 02:20 PM
Super Streeter Super Streeter is offline
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That 3.875" stroke,and yes it will fit in most production 400 blocks.A 421 is as big as it gets the easy way.I have heard of bigger,but I dont know if grinding the hell out of the block and running small journal rods is an easy deal to build.Some kits with offset ground 3.76" cranks with small journal rods are a good deal because they go together with almost no grinding and dont cause cam clearance problems.You can do a 415 without a small base circle cam or block grinding if you use that setup.The best way to do a 434 is with a bowtie block.You dont need a raised cam version,but you need the added crankcase clearance of the bowtie block.With a raised cam rocket block you can stroke it to about 460 inches,but at that point you have to wonder why you didnt buy a 454 pickup truck motor and bore it .030 over and have a 461 for about 1/3 the cost.
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