What ET should my Duster be running?

Ok, skip the mega burnouts with drag radials. The first time i ever made a pass in my 73, i drove AROUND the water box, no burn out, left off idle and just sort of "squeezed" the throttle, 60ft was 1.7ish and et was like 7:11 1/8th mile. Thats a 10' convertor and drag radials.

Yeah, I think I might have to try a few different things next time I go out.