Double check, as it looks like your car in this configuration will be at 2500 rpm in 3rd, and about 1800 in OD at 55 mph.... (1800 won't put you into the main jetting on most normal carbs without some modifications), little over 2000 rpm if going 65...205/60R14 on stock rims will be slightly kinder...

I was wrong, but not about the rim size... 205/65R15 is the size. Could change if necessary - tires are pretty old and probably shouldn't be driven. Would stick with the 15" rim though. I went with 205/65 because it was equivalent to the 195/75R14 that was on there.

Would prefer if the speedometer is accurate though.