The 532 sounds like a cool project. Thanks for the vote of confidence.I'm planning on doing basically the same thing with a mild 532 and a 273 gear. I would get a good convertor designed for your particular combination but I would bet money it runs easy 11s. We had a 700 hp 505 on radial drag tires with a 308 that ran 10.70s at 130 20 years ago
What converter behind the 505? What tires? What weight?