307 was the base engine, no SS every came with it. It also looks like Welcome to the site is in order since that was your first post.
1971-72 saw the Z25 SS Equipment option (396 engine) dropped and only the RPO Z15 SS Equipment option remained. However, the new RPO Z15 SS equipment option did not include a specific engine size as it had in 1970. Rather, it became more of a dress-up option and could be ordered with any optional V8 engine and optional transmission; meaning either of the two 350 cubic inch engines, the 402 cubic inch engine or the 454 cubic inch engine could be ordered with the RPO Z15 SS Equipment option. Only the lone remaining 454 engine (RPO LS5) required the SS option to be ordered while the two 350 cubic inch engines and the 402 could be ordered with or without the SS option. The RPO Z15 SS Equipment option remained essentially the same for 1972.
Ray
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Ray
1970 SS Chevelle Van Nuys Built
Last edited by shadowgray396; 06-22-2010 at 06:13 PM.
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