The 760 and the 8820 are almost identical in capacity. I had a 1980 760 and my bud had a 1980 8820 and we were dead even at all times. The 8820 is turbo charged but I had a tuned V-8. Iprefer the 760 because it easier to work on in my opinion. Also the 860 was discontinued in 1987, a big shame I think.