Re: which radial size & opinion
Polyglas tires were great technology for the time, but like you said, why pay $600, plus shipping, plus mounting 40 year old technology when newer radials are less expensive, ride better and handle better. The 225s are closer in size in my opinion. I had just rebuilt my front end and the rear Multi Leafs gave my Camaro a nice stance. The 225s filled the wheel wells perfectly.
If your suspension is new, you will have no issues. If you are concerned, have one tire mounted when you purchase the tires and put it on the front to check for clearance. Any good tire store will give you that courtesy.
Let me know what you choose.
1968 Camaro Coupe
1964 Malibu SS Unrestored 36,000 Mile Survivor
1964 Malibu SS Hardtop
1966 Chevelle SS 396
1968 Malibu L-79, 1 of 4082 ~ SOLD
1955 Chevrolet Bel Air Unrestored 15,000 Mile Survivor
1955 Chevrolet Nomad
1984 Hurst Olds with Factory Sunroof, 1 of 99 ~ SOLD
1992 Camaro 396 LS, 4L60, 9" Posi w /3.50:1 Gear Set