Jay78: I finally found your thread a few months back on the stopwatch 19.13 at 73. Good method, I used to do that with my dad back in the day.
So I built a Gonkulator file of your car (about 140hp gross unsmogged, 115hp net like today's ratings)
With the T350 you have the Gonkulator said
2.99 60ft
12.54 at 57.1mph 1/8-mile
19.39 at 71.0mph 1/4-mile, call it close enough
I tried a T200
2.92
12.35 at 57.1
19.20 at 70.4 I wouldn't bother
Also tried a Powerglide for fun, what a dog
3.29 (I could WALK 60ft almost that fast)
13.66 at 56.2
20.72 at 68.1 (more than a second slower)
Next try was a 200-4r trans and 3.73 gears, 2500stall:
2.48
11.57 at 57.7
18.41 at 71.6
A full second quicker than where you are now, and a lockup converter to cruise for MPG.
I would aim in this direction unless you come across something for free.
This is all with the engine left alone, so far.
But until you get some gears in that machine I wouldn't change much under the hood.
Looks like the 78 Nova is about 450lb heavier than the 62-64 Novas equipped the same way. My early ones weigh in about 2850lb with a 250/t350.
Cruisin64's BelAir is about 200lb heavier than your Super-Nova so actually with the mods it already has, might be close to what you are seeing.
