my buddy has a mufflex exhaust on his f-body, its 3in ory to 4in, 4in allthe way back to the muffler, the 4in tail pipe tucked up behind the bumper. but that was on a procharged 383, i dont think you neeeed anything that extreme. but if you do, it will sound great.
59 chevy apache>old school rod with 5.3.
92 chevy swb>full frame, bagged, 98 interior swap.
02 chevy swb>LT interior swap.
01 tahoe> lowered on big wheels, family ride.
97 ford diesel>big turbo,injectors,oil pump,etc.
85 stang coupe> black on black, H/C/I.