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mild68 · 02-21-2016, 12:01 AM

Great score.
You may be interested in this. There is a big block 400. http://ls3registry.macswebs.com/tech/trivia.htm
A 402 is a .030 over bore 396. Nothing to do with the heads. Although yours may have 454 heads.

02-21-2016, 12:01 AM	#4
mild68 Registered User Join Date: Dec 2015 Location: Normal, Il. Posts: 110	Re: '72 GMC Shortbed Stepside...last truck Great score. You may be interested in this. There is a big block 400. http://ls3registry.macswebs.com/tech/trivia.htm A 402 is a .030 over bore 396. Nothing to do with the heads. Although yours may have 454 heads. __________________ my next project 68 step side 5.3 S10 build thread My 68 Chevelle SS396