Disc or drum

If your current brakes can skid the tires, no other brakes will be able to stop the car faster. I challenge anyone to give a scientific explanation otherwise. But, drum brakes will overheat and "fade" (friction material melts) if constantly or repeatedly braking (i.e. stupidly using brakes to slow on long down-hill grades, aka FL drivers on Blue Ridge Pkwy). They may also fade in stopping from very high speeds (>80 mph). Many drum brakes are poorly maintained, so give uneven braking between L & R or gunk on the shoes causing grabbing, thus people saying "drums didn't work". But, semi trucks still use them.

Re disk choices, Scarebird is cheapest and uses easy to get Chevy & Toyota parts and can stay SBP. Wilwood also allows SBP. But, insure your current wheels will fit. If you change to LBP, you must change your rear-end to match, carry 2 spares, or no spare. Many new cars come w/ no spare and just a can of stop-leak. Most gomers today would have to call a tow truck to change a tire anyway. I find no deficit of 14" tire choices for the 6 of my 7 vehicles which use them, at least in the price range I shop. But, you can buy 17" alloy wheels in SBP reasonably (~$170 ea, search past posts).