if the motor is stock, then you won't have any problems
i ran a 3k carb with 4k-c jets on my worked 4k for ages, it pulled 8500rpm no worries. it wasn't ideal, but it worked
compression should be 172psi stock, i'd say your motor is in need of a hone and re-ring. but as long as they're all roughly even (within say 10psi of each other) you could use the motor, it just won't be very powerful, fuel consumption will suck, and trying to get power out of it will be a total waste of time