>Even with the 1.9 I can cruise at 75 on the freeways.  I floor it up the
>hills and try not to go over 80 on the flat sections while the A/C is
>freezing the back of my neck.

Funny, I had a 75 1800 Bay which had a slip-in 1916 kit. Otherwise it was
stock. It cruised quietly and happily at 130kmh (81mph), as per the owner's
handbook; on the flat it would hit 140kmh and still be accelerating
strongly when overtaking (I never tried to find out what it would do at
full tilt, to my regret); it had no trouble with New Zealand's numerous
hills; up a very long very steep hill (the Kilmog near Dunedin, to the
Kiwis out there) it would haul a full load at 80kmh in third, then change
back into top and up to 100+ again when the gradient lessened well below
the top of the hill. It went really well and was real fun to drive. Maybe
US-market Type 4 engines were detuned? I can't believe a mere 100cm3
increase in capacity and slight compression increase could account for this
extra performance.