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**truckster** · 02-19-2013, 06:03 PM

I'll throw my 2 cent's worth in here as well. I have just a couple of thoughts to add.

There are a lot of complaints about the 400 SBC and heat, but the real problem is cooling. If you cooling is good, the 400 is going to be fine. I personally love the 400.

People always talk about boring .030 over as if it's going to add a lot of power. I tend to look at long life, meaning I might need to rebuild an engine 10 or 15 or 20 years down the road. For that reason I like to go with the smallest overbore that's going to give me clean, straight cylinder walls. If I can get that with .010 over, I know I've got at least one more rebuild on any block. If I go .030 right off the bat, I may not be able to go much more in the future.

Just my opinion.

02-19-2013, 06:03 PM	#16
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,798	Re: * 400/406 sbc BUILDERS PLEASE READ * I'll throw my 2 cent's worth in here as well. I have just a couple of thoughts to add. There are a lot of complaints about the 400 SBC and heat, but the real problem is cooling. If you cooling is good, the 400 is going to be fine. I personally love the 400. People always talk about boring .030 over as if it's going to add a lot of power. I tend to look at long life, meaning I might need to rebuild an engine 10 or 15 or 20 years down the road. For that reason I like to go with the smallest overbore that's going to give me clean, straight cylinder walls. If I can get that with .010 over, I know I've got at least one more rebuild on any block. If I go .030 right off the bat, I may not be able to go much more in the future. Just my opinion.