Oh yeah: that info would help....
So far, to keep costs down, I would keep the stock 63 transaxle and it has a 3 on the tree, which I really like so a manual transmission. The low seems a bit too low as it is but third gear seems pretty good as is freeway cruising. That said, if you have a suggestion for a different gear on either end of the equation for the transmission, please let me know....

I reasoned the 250 wiould be plenty of power for the little shoebox Nova and it was just given to me. 25 miles EACH WAY, so 50 miles per day and 80% at 65-70mph. Urban Bay Area driving.

Budget? What's that? I would like to spend 2-3K if possible and it am aiming at that "tipping point" between longevity/durability/decent mileage(20-ish??) and FUN when I want. Now what do you think, Mr Panic guy???