dont get the transmission rebuilt unless it needs it
a word of advice on pulley size, all cars are different, but my cars running this _ (its a regal gs btw)
3.4, DHP 1.0, 3" to 2.5" Downpipe, highflow cat 2.5" slp powerflo dual exhaust, thrasher intake, drilled 180 tstat, 104 autolites. and i still had a ALOT of kr, like 5 to 6 degrees.
definatly add a AFC 2.2 to that list, since there discontinued i guess, look on the boards for one, dont get a 2.0, 2.2'* are alot easier to tune....i extended my wires 7 feet on each side and mounted it in my car so i could tune it while driving. what a afc does is add or take away fuel at any given throttle position (actually based of maff tables). so at idle / cruise, it takes away some fuel it would normally give, and at WOT it makes it give it 105% (or maybe its 104). im now at about 1-2kr, usually around 1. i plan on ordering 1.84 roller rockers from zzp to get rid of the remaining knock....
anyways, what im trying to say is a scanner without a doubt should be your 1st mod. see how much kr you have stock, because yes you may have some. for the price of a dhp, scanner and afc.....order the PowrTuner, but only if your comfortable tunning yourself. my car came with the scanner and dhp, so i opted not to get a powrtuner.
forget headers.....if your going to waste money on headers you are MUCH better off with a intercooler, Wbody store is releasing one, id think it would work with a bonneville, but you can run a 3.2 on a stock car with no kr.......for 800. zzp also makes a ss ic, which is a small intercooler, i plan on ordering to drop to a 3.1 or 3.2 (since ill be kr free with a 3.4)
if your just planning minimal mods, get a 3.5. people dont understand how big a step a 3.4 is. my car had a 3.4 already, so i decided to add additional mods to support it, if i wasn't going to add any other mod then i have now, id order a 3.5 to replace my 3.4
modded & dropped 95 Aurora - SOLD for a 2001 Alero GLS - which is now being sold for a 93 SSEI WHICH got sold for a modded 98 regal GS!!!
98 regal GS:
3.4 / thrasher intake / SLP powerflodual exhaust / 3-2.5" downpipe w/ highflow cat / DHP 1.0 / afc 2.2 / gmpp handling package / other small things