Summit Legend 5 on a 69

[GaRys69]

These look like the only wheels that I can afford at this time.
So I am looking at purchasing the 142's but not sure BS will work?
The 18's are 8.5 wide/ 5.125 BS (front) and 9.5 wide/ 5.75 BS (rear).

Have 1.5 lowering springs and C5 brakes F & R, lips are not rolled.

Thanks for any help, Gary