Nice info.
having had a 301 TA new in 1980, I know about that front/rear counterweight only weak crank for sure. quick story: upon going to the dealer to pick up my ordered 1980, it was up on the lift, oil pan off, crank out and rods hanging down. at 18 I was crushed. seems they also had a known bearing problem. dealer put new bearings in it, never had a single problem with it.
so I believe the 77-78 Trans Ams had 200 to 220 hp brand new stock?
my goal would be 240-250hp. would be fun to "shock" a stock 77 or 78 TA and have em see taillights to a 301 turbo car.