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Nick,

Placerville airport is my nearest, FAA Identifier: PVF
Lat/Long: 38-43-27.2000N / 120-45-12.0000W

I no longer live at Cameron Park Air Estates, so you can't taxi to my house.

As to gear ratios, this is a site I use http://www.precisionsite.com/auto-x/tools/

Ratios of most transmissions Tranny Ratios

Here is your speed in gears for 28" tire and 3.50 rear end.

RPM First Gear Second Gear Third Gear
200 1.9 3.1 4.8
400 3.8 6.3 9.5
600 5.7 9.4 14.3
800 7.6 12.5 19.0
1000 9.4 15.7 23.8
1200 11.3 18.8 28.6
1400 13.2 21.9 33.3
1600 15.1 25.1 38.1
1800 17.0 28.2 42.8
2000 18.9 31.3 47.6
2200 20.8 34.4 52.4
2400 22.7 37.6 57.1
2600 24.6 40.7 61.9
2800 26.4 43.8 66.6
3000 28.3 47.0 71.4
3200 30.2 50.1 76.2
3400 32.1 53.2 80.9
3600 34.0 56.4 85.7
3800 35.9 59.5 90.4
4000 37.8 62.6 95.2
4200 39.7 65.8 100.0
4400 41.6 68.9 104.7
4600 43.4 72.0 109.5
4800 45.3 75.2 114.2
5000 47.2 78.3 119.0
5200 49.1 81.4 123.8
5400 51.0 84.6 128.5
5600 52.9 87.7 133.3
5800 54.8 90.8 138.0
6000 56.7 93.9 142.8
6200 58.6 97.1 147.6

My 383 the way it was built was perfectly happy cruising at 1400 rpm top gear which is 57 mph. The 427 accepts a cruise rpm of 2200, which is 90 mph. Starting at 2000 in 4th gear is 52 mph to 3000 is 78 mph, yet 78 mph in 5th is 1900 rpm and the engine doesn't like pulling a load that slow.