Pushrod mobility

[Kahn]

hello all. I put 360 heads with a casting number that said they were from 77-80 onto my 67 318 block. I switched over the hydraulic lifters and pushrods from the old heads onto this one. I torqued the rocker arm down to spec and I am not able to spin the pushrods at all no matter their position. Is this good or bad? The valve spring on the new head seem beefier than the old ones so I assume that might cause it? Kinda lost and don’t want to keep putting it back together if it’s wrong. Thank you
-Connor

 

[LocuMob]

If you torqued the rocker arm shaft down, the push rods should have a load on them, and they won't be able to turn, it's okay.

 

[CBODY67]

It's called "Pre-load", same as you'd do with a small block Chevy, for example, by turning-down the rocker arm adjusting nut. Compresses the hydraulic lifter center plunger so everything runs quietly, as designed.

Does the engine run as it should?

CBODY67