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**Ricks1971** · 06-15-2007, 12:47 AM

If you are looking for a 400 block. The one that has the 509 casting is the best 400 as the 511 4 bolt main block is the one that is subject to heating problems.

06-15-2007, 12:47 AM	#5
Ricks1971 Senior Member Join Date: Mar 2006 Location: Clarkrange Tennessee Posts: 1,787	Re: Wtb Chevy 400 Short Block If you are looking for a 400 block. The one that has the 509 casting is the best 400 as the 511 4 bolt main block is the one that is subject to heating problems.