well i can tell you with a slant six 225 with 3.55 im at 2800 at 60 mph lol with a 360 would be alot lower thats for sure and if you get the 4 speed with OD you would be cruisin on the highway quite on the RRRRRRRpms im sure on that but dont got any numbers, on my 360 4 speed i have 3.31s Older gear ratio and i know i can tolerate 3.91s more forgiving on the bigger 360, ask A/J he will break it down well. The other manual swaps sound good too but i got no experience on those 5 speeds etc so i cant really say.
