Buying new wheels ... good choice?

About to make the plunge on Rocket Racing Fuel polished wheels. They are made by Holley. Looking at 17x7 on front with 4.25" backspacing and 205/50/17 tires. Rears would be 17x8 with 4.5" backspacing and 235/50/17 tires. Anyone running something similar on a 1967 or 1968 Cougar? These should tuck under the fenders by a 1/4" more than the American Racing Wheels.