well, i have a 91 Z28 with the 5.0 TPI. put world s/r heads, slp cam, slp runners, ported the heads, 58mm tb, gears, blah blah blah. will long tube headers fit and will i be able to get the plugs out. i have hedman headers now but they are rusting and use the y-pipe. basically, i am gonna run headers to an x- pipe to two inline mufflers and dump it just before the rear axle. not much for looks but should work well.

 

They will fit,but a PITA to install. I have Hooker Super Comps,and I can get to my plugs,but have to use a "modified" socket for two of them.