push rod ?
i can buy them rather inexpensive ( not much over 1.00 each) just covering my basis to make sure i use the right ones.
the ones in the 360 are all the same length just a different ball end on 8 ( 4 each side)them and they don't ride exactly the same up in the rocker arm.
ones i just pulled from my 318 to compare are for sure a tad longer just by looking at them even though listings for it should be the same push rod.
napa and rock auto both list the 74 and 69 318 and the 85 360 as the same overall length and the exact part numbers for all three motors.
i dont have precision measuring tools so only way i can do it is with a tape measure.