A dart block with ported CHI 3v's will hold it's own against any AFR headed motor, so the Boss style motor can be a bad ass, but it is expensive.
A stock windsor has poor flowing heads, so it isn't all that great without porting or new heads.
The boss/cleveland has the opposite problem, the heads flow very well but the ports are too large and the low end torque sucks.
It's not fair to compare 30+ years old stock heads to new CNC ported AFR heads.
If it's a junkyard build with a stock 2 bolt 302 or 351 block, the Clevor is a proven performer, especially if you can get a set of small valve closed chamber Australian Cleveland heads.
The only problem is that the heads will flow enough air to make power at very high rpm's. If you are not careful it will make more power than a stock 302 block can handle.
I say go for it. If you can do it cheap, it will be cool even if it doesn't last very long.