my answer is unique ..because I'm a head porter. I would not put them on any engine without porting them and doing plenty of unshrouding to bring out the potential.
Do it, you want to...so go ahead. You'll gain some throttle response which depending on how your engine is tuned an runs 'in general' atm.. might be what you were looking for.
The late model #920 273 heads in this thread are example of what to do with the 302 heads. BtwThose are up for sale by the original purchaser 'he sold the car'.. and has no use for them now.
Whatever you ultimately do is for you to decide. You have the info.
