one thing that pissed me off with my gen II, sure the bolts and washers are stainless but the nuts aren't, so every nut is coated in rust and i don't even drive it in the winter. maybe been on there 3 years now
that old body looks just like my old one , a bunch of fiberglass and sheet metal patches and about 50% of the original metal. it took about 6 small cuts with the grinder and the tub basically fell off in 4 peices. must be a Britsh Columbian thing.
even with 35s and 3.73s, my 76 sounds like its gonna explode at 50 mph on the speedo (thats like 60mph corrected) and i tried passing a car once and will never do it again. plus my alloy tub gets really hot after some highway miles in the summer
i've done the ducting end of them, i'm a tin basher by trade. everyone seems to like them. all your running is a fan or pump with the in floor systems. up here we need a electric furnace for backup though as they only work to -5 degrees celsius
aqualu gives you some goo to put between the firewall and the new tub (sikoflex?). you'll need a special primer for the paint if you didn't already know. if you need more info you can PM me, i've done a couple.