I think the e-bay guy you mean is Skip White,and I think they were sbc heads,what I know is when they first hit the market there were some flaws but there are a lot of good builders using the bbc bare casting and installing their parts,and having good results.again I meant nothing negative here,But I dislike when people say"I heard",and lets be real,all the big name guys have had their share of issues over the years........just my .02