RR;
The Mallory (Dist.) is fine if it has a vacuum advance.
The stock 12V with the Mallory coil is okay too and a cheaper way.
Remember 3,500 (engine) = 1,750 distributor speed & the 'fancy stuff' isn't needed till you get to 5,000/2,500 with 10:1 and above.
Bill;
With 7:1 compression YES.
I've pulled plugs with that and more from abused engines for years.