I know of a guy who bought an old Dodge Van like this a year or so ago. It was used by a fertilizer company previous so him buying it. It's be less than 1/2 your willing to spend price. Condition is fair to okay I would say. Some rust but nothing dangerous. Interested?
Hopefully that IC will support that power with the E85. I know with that same core on my car around 400whp on a 4cylinder on pump gas it just turned into a big heat sinc. Moved up to a spearco core with custom end tanks. Build looks great man!
Tial BOV's are notoriously hard to get setup correctly. Are you sure it's not compressor surge you're hearing? I've got my turbosmart set up that it doesn't open up for anything lower than ~12psi so it doesn't leak. This may be what's going on with yours.
Buddy of mine down at UC sent me a link to one of these videos. Watched every single one. This one is especially funny.
http://www.youtube.com/watch?v=SS-yR3nRl0E&feature=relmfu
http://www.zex.com/zx/nitrous-systems/universal-systems-1/efi-dry/safe-shot-nitrous-system-from-zextm.html
Looks like it's this kit, minus the switches and bulk wire.