Horsepower in stages question.

[Vette73]

Went from stock on my 91 to headers and exhaust and Haiback chip...Few months down the line I had the plenum, I/Hs and air horn ported by Pete, 36 mm.......At each stage I felt a definate increase in power....

Right now I'm 382 RWHP......I'm thinking of porting the heads to 36 mm , Fidenza flywheel, secondary delete, and cams degreed.....

Of course this final step is the most costly due to the time and labor involved....My question is - by doing the " final stage" so to speak is there a significant increase in power and seat of the pants feel? Anybody ever did there mods in stages like I have? If so, was the final stage of porting the heads, degreeing the cams and adding a Fidenza flywheel worth it?

Thanks.....