you may or may not be doing some or all of these but they are fuel for thought
1. DAY AT DYNO
probably the best money anyone can spend for HP. get your car and engine dialed in.
2. HEADS
the big three for HP seem to be
Edelbrock Victor Jr
AFR 185 and 205
Trickflow Twisted Wedge and -R
3. HEADERS
often overlooked. custom headers can make a big difference. Equal length, custom bent, proper diameter.
4. SIDEPIPE
what is your ID and OD. it seems that highest dyno levels on the strokers are coming with a 3" ID and 4" OD. some have even gone to higher IDs. Glass packs seem to be outdoing turbo swirls from historical posts.
test test test
hope this helps
Andy