ctgreddy

As long as everything goes to plan I'll be trading my 347 for a mach motor to put in my gt. Currently I'm looking for a detailed list of what i'd need to do to swap it in, but thats not what this thread is about. basically i just wanna know what mods are worth it. like are longtubes worth the cost. say I swapped the motor in with a mid pipe, catback, udp's, cai, tb, ported intake/spacer, and a 93 tune, about what type of hp/track times could I expect from that? I already have a 4.10 rear end, and 4r70 with shift kit and 3800 stall. Would low 12's be possible with just those mods alone assuming i hooked well.