ok i rebuilt my 20r all new !! i set my valves at in .8 and exh at .12 whats my timeing and dwell need to be set at and can i do anything to my asian 2 barrle carb to get more performance out of it>> its brand new ,, i just think it should have more pickup... oh yah i put a 91 s10 blazer rearend in it too,,, yours truly... tired of dragin ass...