207 block was only 80-85, 010 blocks were 69-79 (but not all were used up until sometime in 1980 in some trucks - seems like they were chassis cabs only and kept the drivers dipstick), and all blocks after 79 were passenger side dipstick.
It it says 5.7l on the block it should be a 1 piece rear main seal. It probably has the provisions for a roller cam but the boss's are probably not drilled/tapped.
-- Edited by RacerRick on Wednesday 11th of May 2016 10:49:17 AM
86 was odd ball for sbc. First year for 1 piece rear main but still old style valve covers. Don't think it would have roller cam in it. Should take regular old stuff.
-- Edited by Lightspeed Mike on Wednesday 11th of May 2016 10:53:53 PM
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