new project / 5.3 w/doug nash 5-spd/67 camaro

[KSBRKTRACER]

Looking for some advice . I have a 67 Camaro, stock subframe, I would prefer not to cut on the floor pan (maybe unavoidable ). I want to install a 5.3 engine with a doug nash 5-speed. I have two different scattershields. Stock camaro throw out position and 62-67 chevy II position . The difference being the position of the hole for the throwout bearing arm. I think I want to install a hydraulic throwout bearing , Is this doable, Is this the best way to go....???? Eventually I want to step up the horsepower ...550 to 600 , is this the way to go. I own the 5-speed already, a Tremec doesnt fit the budget. The nash has a vasco jet mainshaft already. Is there any thing I'm missing here, any thoughts, any suggestions.