mr bryant - i found that copo reference on impalas.org/drivetrain/ and listed as 327,copo 9631 with suffix rh and rj. the site states its a full size chevy research group by warren leunig. it lists the same block casting number upto 1965. i'll post a topic question there and see what pops up.
thanks for taking the time to answer and yes i did see the rj listed in limebook as a 57 283ci and dismissed it. the heads indeed say 3795896 and are the 60cc small valves used on some early vettes,pass cars and trucks with 283-327ci engines. as for the copo info i thank ya for explaing that and...
ive acquired an engine and was told it was from a demolished corvette. ive scoured the internet for any info i can find to identify this engine as such. heres what i have - cast number on block is 3782870 with date code L191, stamped suffix is F1221RJ, crank is #4577, heads cast 3795876 w/date...
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