I have a stock bottem end ls1. Im about to put in a brand new ford 9"gears and a 3600 stall and a wet NX kit with a new tune along with my other mods i have in my sig. In a few months i will be doing heads and cam but thats not for a while. Anyway i was wondering if 150 shot would be ok with the mods i have and am getting. Or do i need to go lower than a 150? This is the highest i wanted to go but im not sure if it would be safe so im asking.[/align]

 

Your bottom end will be ok. Just make sure you have a good tune and all the proper fell safes fuel presure, oil presure, etc.