AC/Alt configuration: The 200 tq engine has the alt on the starboard side, AC compressor to port

AC/Alt configuration: The 200 tq engine has the alt on the starboard side, AC compressor to port. The CQ and S2 are the other way around.

If you keep the stock 200 location: You will have to fabricate custom AC lines. You will have to shift the location of the radiator an inch or so over. There are other minor conflicts to overcome. You will have to re-wire the harness ends which connect to both the compressor and Alt. [cost of having new AC lines run? Who knows?]

_{The Treadway car illustrates the remote-filter approach.}
_{Look closely, and you can see where the A/C bracketry overlaps}
_{the edge of the filter bracket.}

If you keep the stock CQ/S2 location: There are serious conflicts. The turbo oil return line goes into the side of the block right where the compressor lives. The compressor bracket occupies the same space as the oil filter, up close to the bracket lip. Two remedies: 1) home-made: fabricate a new aeroquip line from the turbo to the oil pan extension. Must modify (heliarc, drill, tap) extension to accept hose. Screw a remote oil filter adapter to the filter bracket, and locate oil filter remotely. 2) Factory: buy the S2 oil filter bracket (mounts filter horizontally, out of way of compressor bracket, buy oil feed and oil return lines, buy S2 pan extension threaded to accept oil return line. [I chose this solution as possibly the most expensive, but the least risky, most elegant, and pure factory] You will also need to buy an S2 AC low pressure line from the drier back, since the stock CQ piece will run right against the turbo. [Note: the oil lines are $300 or so, oil pan extension was $28, filter bracket about $140] Numbers for these parts are listed under S2 parts.

Which ever option you choose, the biggest wiring challenge you will have will be adapting the CQ AC controller to the new engine harness. Although the 200 controller looks the same as the CQ's (and it may be the same PN for all I know) the circuits of the two systems are designed differently in their allocation of functions between the engine and main electrical harnesses. As of this writing, we have not finished connecting the A/C.

One alternative? Forego A/C entirely. This would save considerable time and money. As Corey, the main wrench on the project, says, "Anyone can go fast. The hard part is going fast with air conditioning."

A third possibility, and one we might wind up exploring if the AC challenge continues to drag on, is to retrofit the manual temperature control panel from a 80/90 sedan (and which appeared stock on the early S2) and junk the automatic climate control altogether...