Aaahhh, gotcha. I have one of those "barely streetable" cars and trust me, it gets old. Loading up at idle, loud exhaust, lots of heat in the trans and motor which can be tough to manage... But hey, if that's what you want... You likely understand that most of the time you're at part throttle on the street so you'll rarely be using half of that 550hp anyway.
If it were me I’d forget about the solid roller and try to find a flat tappet grind that makes power at a lower RPM. Nobody will know what kind of cam it is unless you tell ‘em. Then you won't need roller valve springs and your current converter and gears should be fine if you keep the duration @ .050" reasonable.
