Im tossing the idea around of running boost in the next year or too. " prob a trick stage 3 kit on 10ish psi" my main concern is will a 4l60 hold up too 500-550 rwhp? reason im asking is my gf wants to buy me a stall for my bday in a few weeks and i have a 4l60 now. i was thinking of getting a 4l80 but i dont wanna have to do the work twice and but 2 stalls... thanks for the input mods are in sig.. .

 

With that much weight and over 500 hp, I would seriously consider the 80