Ask all the questions you have...no worries. (or just buy the car...
You are correct on the mods and Dick is spot-on with the wheels. They are still 4 lug and I had the wheels made (wasn't expensive at all) by the circle track supplier 'Bassett' in their 'lightweight' line. The wheels are indeed pretty light, especially for steel. Stock brake calipers in front but with braided stainless flexlines (and good ducting). The brakes hold up very well as porterfield makes really good pads.
I've not seen Koni's in ages for the Hbody, but I have several sets. My spares package for this car is just stupid. Two spare hoods, two or three hatches, several sets of taillights, Headlight trim panels, complete set of suspension arms, spindles, torque arms, driveshafts for 5sp and 4sp, two saginaws, shifters, spare block, crank, heads, front covers, etc etc.
The front springs were also circle track sourced and I'll need to check my notes but the spring rate is UP THERE. 850 comes to mind but it might have ended up at 900.
The front air dam was custom, but stupid simple. It would be pretty easy to make copies. I'd thought about duplicating it and the T5 mount to sell to the H community, but with a GT1 car now I simply have no time....couple that with a job change and maybe moving and I need to start clearing out stuff quick (sold my motorcycle tonite in fact!).
Still got questions? Keep them coming...
cars and such...