First time swapping edelbrock aluminum for 915 cast iron heads.

the edelbrock performers are a stock style replacement head. you should be able to reuse pushrods but make sure to check valve train geometry after the switch. and yes every pushrod and lifter needs to go back in the same spot, although for a head swap you should not need to pull lifters. easy way to keep pushrods in order is to take a piece of cardboard and punch holes in it the same way the pushrods would be oriented in the motor and mark which way is the front of the engine, as for if you will need shims its best to assemble it and check valve train geometry as i said, and make adjustments as neccesary