5x4 Bolt Pattern Aftermarket Options

My apologies to everyone in advance regarding estimated rear wheel/tire clearances. Must have been a late night and half asleep when I initially read the existing tire size on the rear of the car. Car already has Cooper Cobra 235/60/14 on it with 8" US Indy mags: 3-3/8" back set leaving 1-7/8" between tire sidewall an spring.

So the 4-5/8" back set on the Coker Rallye using the 235/60 would be set 4.625"- 3.375" = 1.25" closer to the springs leaving 1.875"-1.25" = 0.625" clearance between tire side wall and spring. Is this adequate/safe? Maybe could run a 1/4" slip over hub spacer?

For front thought about the Coker 14"x 6". It shows 4.00" back set. Anyone running this much back set on one of these Barracudas' without having rubbing issues on frame etc? I currently have 195/70/14 on front and no frame clearance issues with wheels turned sharp, but the engine and tranny weight isn't on the suspension. I put these new tires on it after engine/tranny removed to move it around in shop.