ticking at high rpm

from a 273 you need the pushrods, rockers, shafts, everything. the pushrods have a cup on the upper end, rounded on the lower end. the pushrods you have now for stamped rockers are rounded on both ends.

try to keep the shafts assembled it will be easier later if you dont mix everything up.

the pushrods will probably fit unless you have had lots of millwork done.

but like Rob said, you can get a special one that you can adjust and measure with. then you can buy a set of cut-to-fit pushrods from mancini or wherever and get them cut / pressed together for your length