Ok John, my bad, I re-read your initial post and realize you are talking about a 250 not a 235. I would go with Tom Langdon's suggestion on the Tee out of the thermo housing. If you go with hard line, 3/8" should be plenty big for the plumbing. You should be able to place a shutoff valve in there somewhere, but you benefit from intake heat just as much in hot weather, as in the cooler months.
I just drove through Valdosta today, on the way back from to FL from Bowling Green. We have any active Inliners chapter in GA with over 20 members. Most of these guys are only too happy to help out "newbies". Most of them are around Atlanta, but at least one is in Waycross, not too far from you. Contact Jimmy Wilson, chapter head, at holley2100@aol.com, he can probably hook you up with somebody closer to you.
