Front vs rear wheel sizes for best handling

From reading these posts (if I understand correctly), even though these cars need as much FRONT rubber as possible for max effort, if you are going to run different size tires front/rear at least make sure the overall height and aspect ratio are the same... Right?

I can attest to crappy handling with my 215-65-15 fronts and tall 275-60-15 rears (with the rear springs beefed up and sitting a bit higher) on my '70 Duster. The inside rear of the car lifts badly in hard cornering and it feels like the front/rear weight distribution is messed up. I wanted 255s for the rear but the Firehawk Indy 500s got discontinued and there were no more left; as a result like gmachinedart said with the 15 x 8" rear wheels the sidewalls bulge out visibly. Looks kinda cool in an old-school way but sucks for cornering lol.