both engines turn free,been in my garage for over 30 years.1) tri power block,less intake,has tri power heads.cast #3755011,date,J3058,front pad#TIIIIFA. 2) 4 barrel motor,vintage edelbrock alum. rocker coverscast#3755011,date,I1459,front code,T0929H. 1-386-329-2080 8-5 mon -fri ,also need fenderwell headers for big block in a 55 - 57 chev. thanks,Larry