I have a 1972 B20 E in my 1967 122s with a weber carb.. I have been trying to set the electric choke on it and I think I have it working pretty good now after watching a few You Tube vids on setting it.. It seems to be running very well but when I come down a long hill ,about a half mile or so geared down with no throttle it seems to buck and stumble for a bit when I start going up another hill at the bottom ,, down one hill and up another right away.. The new temp. gauge I put in reads about 180 degrees or so and I am wondering if I put in a hotter thermostat if it would help.. I do a have a new 195 degree one in my box of junk but would that be too hot ??.. The outside temp will be in the 90 s this week.. Thanks in advance