FWIW & IMHO:
Just keep in mind that the recipe cars all involve alot of tuning both with the supsension and engine, and they all require race gas. They sometimes make it seem easier than it really is at a glance. This is not meant as a discouragement to you in any way, as careful tuning and planning will eventually get you where you want to be. Notice that the recipe that ran 12.3 had forged pistons, ported heads, ported intake, headers(easy), much larger 63 turbo, electric water pump, a 3200 stall converter, roller cam, and an oil evacuation system. That's not really a typical bolt on buildup, it's more of a purpose built setup. Not that it's a bad thing, that's just what it takes to run low twelves without intercooling.
Mike Bonneau's recipe on there that has gone 13.2 is a more common and maybe slightly more realistic bolt on recipe. He achieved that with basically a downpipe, headers, exhaust, a TA33 turbo and larger injectors. The motor is internally stock i.e. no porting or larger cam. Again race gas and slicks were used. The key with any of the recipe combos is tuning and traction.
To run 12's you will more than likely need something larger than the stock turbo and injectors, and over 20psi. Upgrading the exhaust (downpipe/headers/cat back stuff) is also a large priority with these cars. Upgrade to the 87 ecm which is pretty simple, as it allows you to get more valuble information from your ALL IMPORTANT SCAN TOOL. An upgraded fuel pump is an absolute necessity, whether you get an IC'ed car or a hotair, as they both came with the same crappy pump.
Like already mentioned, if you want easy 12's get an intercooled car. 12's are harder in a hotair but doable if you like to tinker and are a careful tuner.
