right truck, wrong motor..."ls" 5.3 vs 350 TPI

[hotcorner216]

Been looking for a swb c10 with a 5.3l to make my daily...the finished ones ive seen have been for 23k+ which is fine just havent found one i like enough to pull the trigger on...i was originally going to build it, which i might but i already have a project chevelle so id like something at least drivable with a 5.3 already in it....anyway...i found the right truck, color combo, wheels, interior, even has working AC...but it has 350TPI, i dont know much about the tpi...i know its similar to the vortec as far as the block...really wanted a 5.3l to get into the high 300hp/low 400hp mark...is that hp range realistic for a streetable, daily drive in a tpi? What do i have to change? I know its kind of all over but Thanks!