NEED HELP

[jamiemirror]

You are in USA. Use Ebay as primary market for your purchases !
Some estimations (in desired order):
1. Rear end GTS, LSD - $200-250 - first step in your upgrade. Get algo brake bias valve from GTS Corolla (I personaly prefer Willwood brake bias adjustable valve - $45 worth new).
2. 4AGE engine. Doesn't matter the source - any AE86, AE92, AE101, AE111 Corolla, any 4AGE equipped Celica, any MR2 with 1.6 engine will fit straght. You have a chance to get 4AGZE (supercharged) or 20V engine. $150-450 price range (4AGE from AE86/AE92 - 4AGZE or 4AGE 20V).
If you get 4AGZE or 4AGE 20V engine, forget about carburators. But you will start from ~160-170hp non-tuned (except 4AGZE from MR2 MK1 - 140 hp) !!!
3. Do some engine rebuild - at least change gaskets/rings/bearings. 4AGE don't need extensive head works unless you want 180-220hp from NA engine (racing only). You can choose thinner head gasket also - 0.5-0.8mm will raise a little your CR for good.
4. Buy carburator adapter plate - $170-250 new, a little less (maybe) used. You must be carefull - there are small and big port head styles. Just 2 styles, don't mismatch them.
5. Buy carburators (matched pair) - any DelOrto, Weber, Solex/Mikuni 40 or 45s will fit. IMHO 40s are the better choice if you don't plan to use car only for track. Estimation cost $100-250.
Buy some low-pressure (~3-5PSI) electric fuel pump also. $20-100 range (any pump in good condition will work)
6. Buy ignition management controler (MSD ?). $150-400 - there is also cheap and more flexible alternative - http://www.picasso.org/mjlj/. If you use it - you must buy some Ford EDIS components (easy available from wreckers). That way you can remove 4AGE original distributor also :-)
7. Buy racing camshafts (optional). If you decide to cross 160hp - you will need them. Any combination up to 272 wide and 8.35mm lift will work without valvetrain upgrade.
8. Buy/build 4-2-1 or 4-1 header (optional).

Topics 7 and 8 are optional and can be postponed. They multiply overall engine tuning effect in terms of more power and more response. However if you choose 7, expect a little loss of torque in low- and mid-range.