Quote:

i heard the tractor fluid lowered the stall. by how much does it change it?



I think it depends on how tight your converter is but I ran the heavier AW68 20 wt and it lowered it between 200-300 rpms.

67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 8.70s-152
414 cid SB Dragster 7.65-174