Good insight. I'm not really bound to the idea of a turbo per-say -- the original idea was to bolt on an extra 75-100HP without much fuss. The car already has a nice exhaust, but factory manifolds (no idea why...) so any further changes would require getting rid of those manifolds. So, when I thought about it, I was thinking a turbo kit would be a good way to kill both of those needs in the same operation and keep things otherwise stock.
But after considering that I'll need to go all the way down to the head gaskets to hold much boost, and I'll have the A/C condenser/radiator/fan removed to install the 134a conversion kit, I'm thinking for now I might just go with a heads/cam/intake and fuel upgrades and accomplish essentially the same goal. For about the same price, I can get a GT40 Explorer intake, SVE knock-off aluminum heads, an F303 cam and roller rockers, and toss on a cheap set of shorty headers (or say screw it and get a good set of long tubes) to add 75 or so HP without much risk to the block.
Or, stick with the original plan, and just do a set of MLS head gaskets and maybe add the GT40 Explorer intake and keep everything else stock, and add the turbo kit at 6-8lbs.
Either option should yield about that 75hp increase I'm looking for, for now. Maybe after a roll bar and brakes I'd be convinced to go north of 400HP but that's not all happening at the same time.