How much ET will i pickup with following changes

I think given the differences in 727 and 904, plus the convertor, assuming it hooks, you'll get more than .3. Not a ton more, but more. Stick a set of 4.30s in it and it will pick up more. Heavy car for 4.10s and a stock stroke...

Agree. I drive this car on the street a lot, so at some point i have to compromise a bit for driveability.... lol
But yea, would love to try a 4.30 gearset. Will see what it does with the trans/ vert swap and go from there.