My car weighs 3350. Motor is 72 cubes bigger, -1 heads, 15-1. Similar intake cam timing (285/292-112). It has been quickest with a 6100 true flash, 4.30 10.5x31. Being your engine is smaller with similar intake timing and less compression I would bet it likes even more converter than mine. Best 60ft is 1.250 off the foot brake. I'd leave the 4.30 in it. Mine goes thru at 7300@150
Doug