So I'm building a SBC from the ground up - is there a performance difference from one SBC to another? I think I have a block from a '74 truck with 4-bolt mains. Is this a solid platform for my build or should I go a difference direction?
The casting is actually 3970010 - a common 70's SBC casting. Came in both 2 & 4 bolt, with HP flavors in the 140~300 ranges depending on year(s) and application(s) ...thanks for the help and replies - you guys are great. Looks like my casting number is 8970010 and engine pad stamped V103(or 8?)1TMM. Anyone know what I have my hands on?
Jason should stick to good research and facts, not just parroting what he hears from others. The "010" and "020" cast in the timing cover area have nothing to do with grey iron metallurgy - they only identify that front bulkhead core pattern as being used for both the 010 and 020 (307) blocks.I also have seen this info in Jason Scott's " Camaro Restoratin Guide 1967-1969" , published in 1997. On page 155 he states "Code of intrest is casted the front of this 350-cubicinch V-8 block. "010" here designates the "nickel" content of the cast iron from which it is formed10 pecent . Proformance engines, like z/28 302 and L78 396, often used 20-percent nickel content, which resulte in a stronger, more distortion-resistant block. Small-block V-8s were often cast with an "020"code in the timing cove." This is the caption under a picture of the cast 010.
Keith - never took it as a 'right' or 'wrong' thing :thumbsup:Like I stated before, I'm not saying you are wrong, just pointing out that this story has been told for years like the Loch Ness Monster story. I would think that a person publishing a book should know their stuff. ...
I always wanted to be a Fireman - maybe when I finally grow upI am a firefighter ...