ok so i rebuilt a 302 .030 over new pistons moly rings and kings bearings. i reused the factory lifters, ported gt40s and e303 cam with 1.72rr. i adjusted the lifters with shims before starting the engine. it has 65 lbs of oil pressure but smokes pretty bad after i hooked up the exhaust, non when it had open headers... then about 10mins in it developed a nasty tick, loud enough i shut it right down....... any ideas? i did check ptv during install new pistons have huge reliefs.