Traction Control Needed...

14" Rallys were 5.5s, IIRC; came with E70s or 7.35s or 185s

You can put a 235/60-14 on the front on a 7.5
On the stock rear end I think the limit is 255s or just maaaaybe 265s. Minimum width rim I think would be an 8.
I highly recommend aluminum wheels, cuz when the tires get fat, the pkg gets heavy, and that is unsprung weight, and so they start to put a lot of "feedback" into the chassis. Two of my 10" aluminums,IIRC, weigh about the same as ONE steel rally. 295 tires are heeeeeavy.
If the front rim is too narrow for the tires it will pull the outside edges up off the pavement, and so run the centers off, and of course you wasted money on those. To compensate for this, you have to air the tires down. Once you get down to 24psi, the handlig is GONE. The tire rolls under the car and you skate on the outboard edge and plow into stuff, while chewing up the sidewalls. Don't make this mistake, it can last for years,lol.
If the front rims are too wide for the tire, it may be difficult to get them on the beads. But if you can get them on, you will have to run extra pressure to push the centers down, and that is good for handling and gas mileage,but not so much for ride quality.
My 235s work very well on 7.5s, running 28psi all the time except on Saturdays I pump them up to 30.