You're not TOUCHING 340rwhp on an anything streetable 302 that isn't twisted to the freaking moon on a happy dyno.
I just gave you some #s that are pretty decent for ported non 'p' GT40s. Yea the wall thickness sucks but you ARE NOT getting away from that anywhere under $1000 even for used aluminum **** (and I still wouldnt trust just slapping them on), but whatever..it'll get it done for the moment just tune it safe, run studs and decent HG's.
If you think you can't afford it; you really cannot afford it. There are so many 'small' items that really need attended to that it adds up so fast. Here's just a 'basic' rundown of any non half a$$ job and I will use some pretty realistic #s.
Power adder (vortech) @ $3,000.00
Anderson Power pipe $220.00
Ford Racing 42# inject $320.00
Lightning 90mm MAS $90.00
Inline booster pump $340.00 (you can haggle this with a 255 bs but I like to be safe, incl my intake 190 paired with it)
Boost gauge $40.00
Wideband 02 gauge $200.00
Tune and chip $500.00 (usually more.....mine was and I had an SCT 4bank already)
NGK TR6 plugs $20.00
Oil change/coolant $30.00
_________________________________________________________
Total for an honest setup $4760.00
I need to go throw up because I also lunched a rear main and a fresh clutch on the dyno. If you feel these $'s are cheated you are straight up lying to yourself. They are well within $2-300.00 of what you are going to spend EASY.
Then tell yourself you WILL need a bottom end....and don't even think about the H/C/I costs you might incur ontop of this..... Oh yea. There must be some rich sumbitches building mustangs, because you can knock down 90% of the power figure with well under 3k into an LS1.
You want a # for cheap, get the heads worked and get a bottle. Try and buy a used power adder complete setup and PRAY it isnt trashed and missing ****.
Please do not get me started on the cost of getting the brakes and
suspension up to snuff, the driveline beefed up, ANY amount of bodywork (ie. that snazzy hood to clear your new intake).
I can promise you this: This will be the absolute last pushrod mustake I will ever trick myself into investing in. I have like 3yrs of like endless $ shoveling into a car that REQUIRES like 3k to do it right to even get it back down the road (DSS 331 + tune + misc incurred costs/cam etc). It will still just be at or eclipsing 500whp, and only like 10k later!
WHO in the right mind is going to want to build a mustang?!! I even do all the work myself lol.
The ONLY way to play is to BUDGET BUDGET BUDGET and be happy with whatever you get. Otherwise just switch camps now or move up the
pony foodchain into an 03/04 car.
Cheap, fast or reliable......clearly I haven't spent enough yet.