Thanks for the responses to my requests.
     I wasn't to go John Slade's route and try to put in an air
    conditioner and the lines need to take 250 to 300 psi.  The larger
    return line should only see about 175 psi on a hot tarmac (engine
    off) and the feed line will see up to 275 psi (assuming a
    inefficient condenser) on a hot day.
    Finding a place for the condenser is the main problem as I see it.
         I'll look up Mazdatrix for the exhaust studs.  I hoped someone knew
    the exact size so they could be purchased locally.
         Here is a math problem for you brain types (all rotary head but me)
    -how much fuel will a tank hold that is 3.75 in. tall, 15 in. long,
    11 in.deep on the bottom, top is 6 in. deep then slopes to zero at
    the front? I think it is about 1.8 gal.
    ___6in._
    |                \      |_________\
           11in.
         Wendell