Well Boss I have the same engine and it is a common block. As 76gmc1500 said 302 327 & 350. They came in a lot of cars. Mine is a 350 from a 74 impala. Again the heads are a 76cc 202 int 196 exh. but not too bad. they are said to be one of the best of the larger combustion chamber heads. As for the 010 on the block if it is cast in thats a good thing, it meen that you have 1% more nickle in the casting to prevent cracking. You may also discover that it has a 020 casting which represents 2% tin added for the same purpose. Either way it is a more desirable block and I have had little to no mechanical problems with mine. Change to an Edlebrock Performer intake with a 600 cfm 1405 Edle carb, add a big K&N filter and maybe even some headers. For about $500 at Summit you'll love it. Drop it in that TA like that and I bet you run around 13.6 in a quarter. Slower than some but faster than most. That's my advice anyway