Need Help on Magnum 360/380 hp Crate Motor Tech Info

Besides cam the long block is stock.

I got one in my 68 Valiant, the person I bought it off installed a 2800 stall converter but really under geared it 2.96:1. In town I got to drive in 2nd it's liveable but neuters the power substantially. I haven't decided which gear in gonna up grade to but 3.55 would be minimum. But im thinking more like 4.10. Since your doing a 5.2 your power band will move up 300 rpm or so. Mine starts coming in around 2000 rpm so you'd be 2300-2500.