My friend & Coworker that has a 63 Chevy II Nova vert recently bought a 64 Comet vert with a non orig 289 that’s worn out but he also got the #’s matching 289 with the deal, car runs & drives but smokes and has blowby, orig engine is in unknown cond. and he asked me my opinion on rebuilding the orig engine or dropping a used Foxbody 302 in the car? IMHO a low mile used 302 (hyd roller) engine would be better and save the untouched #’s 289 for resale, sound like the right choice? cars just a cruiser for weekend stuff and burger joint shows