better plan on a few thousand...and watch it just balloon from there!
Honestly, the best way is just to start researching and writing it all down.
My genIV 6.0 with LSX carb intake and holley 750HP Street, L92/LS3 style heads, headers, and a 223/231dur@.050-.610/.617lift-112LSA cam, and MSD 6LS2 firing the coil packs ...and should make a bit over 500hp.
__________________
Kurt -
'68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy
'72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close
'06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD
'18 Kia Sorento - wife's econo-driver
'95 Chevy S10 - reg cab shortbed, LS, 4.3, auto...
my '68's powertrain and chassis build -links broken
A surprise phase - carb to efi -links broken