Hey man, got your PM. First, let me be clear that I don't know if this will work or not. Just wanna be public about that lol. The intercooler I have is for a front mount mustang kit, and Procharger told me that they tested to 40psi with 0 failures. Would it hold at 70psi? I asked the same, they said "I dunno, try it!"
They go from $200-$300 on ebay, I'd take $150 plus shipping. Has very big tanks and passages through it, so I am thinking it was designed for flow in mind more than extreme cooling (like towing). It was designed for a P1SC kit, which is about 1300cfm, so it should meet your needs, just depends if you want to be the guinea pig for cheap used supercharger intercoolers.
I was going to put it on my first gen with a Six-Pack scoop, but if I haven't done it by now, I'm probably never going to do it. I would put it long-ways across the valve covers on top, opens up to all sorts of creative scoop options being a rat rod and all.