NO, in fact, just about the only thing that is different is the Manifold itself. I think the Begi is still in your pricerange though.
Begi Mani/DP: $750 shipped
Used SR20det T25: $50+$75(rebuild kit): $125
Used Bipes: $175
Used 1.8 inj's: $50
2.5" IC setup: $250
Bosch BOV: $50
Oil/Water lines: $100
Used Begi AFPR: $175 (on a 1.8 not sure)
Walbro 190hp: $80
Random vacuum lines, DF fuel rail parts, BOV hose, random fittings, etc...: $75
You've still got $150 for pop-up expenses.
I'm gonna throw out a random number here and say that on a 1.8 w/the above setup running 8-9psi, you could see 175rwhp, maybe near 200@10-11psi and good tuning w/a full exhaust/no cat.
You could go significanlty more budget and go w/just the Turbo/DP/Mani/CrossoverPipe(w/BOV)/ and a little sumthin' for fuel. Keep your timing pulled and skip the IC and fancy crap for 5-6psi and a good 150rwhp.
Check out this thread:
It's primarily a 1.6 homework thread, but almost everything translates to 1.8 motors. Like others said, you've got to pick a power goal. $2k is quite doable sourcing used parts and using a traditional setup. The classifieds here, miata.net, ebay, etc... are good sources.
Also, when planning for your power, don't foget a Miata weighs in about 1000lbs less than your DSM's. 200rwhp goes A LONG way. I think that's probably a good number for 1.8 guys to aim for with an "up there" mechanical setup or budget eManage setup.
What is the current mod status of your '95? Give us a list of eveything so far.
Miatas are as much about handling as power, so don't forget a good set of rubber, maybe some lightweight wheels to go along with them, shocks, swaybars, rollbar, and a few other things. Budget about $350 for a clutch no matter what! Welcome!
Disclaimer: I'm not a 1.8 guy.
I've spread my purchasing out over about the last 2-3 months... even though I think I'm closing in on $1800, it doesn't seem like that much.
or... you could just buy this and call it a day: http://www.miataturbo.net/forums/showthread.php?t=4949