LS3 cam swap and vacuum

[NovaSF]

Thinking about a cam swap in my 1970 Nova. Car currently has a LS3 “hot cam”, TKO600, 3.91s (440whp/400wtq). I drive the car everywhere any chance I get. While the car is definitely fun it’s fairly tame. Looking for something a little more aggressive along the lines of a stage 3 Brian Tooley, Gwatney, TSP, etc..... The tuner will custom spec the cam.



Anyone have a similar set up or can comment on vacuum with a fairly aggressive cam swap? Car has factory power discs up front/rear drums. Any Potential vacuum issues with the new cam....? I’d prefer not to Hydro-Boost.

thanks!