273 rockers? on 340

[swinger340]

Rocker shaft hold downs in the wrong locations as seen in rapom65's pic. easy fix. And that is why people need to pay attention to detail when assembling an engine. Have pulled apart engines with stamped rockers on the wrong sides. Clearly marked LH and RH. All the LH on the left side and all the RH on the rt side. Incorrect

 

[RogerK]

Roger....Adjustable rockers can be used with hydraulic lifters, BUT, stamped-steel rockers can't be used w/solid lifters. Using adj's on hydraulics lets you dial-in your preload precisely, plus you can compensate for a smaller-than-stock base-circle cam w/o having to change pushrods.

Roger, they're also useful for high rpm motors, where hyd. lifters might pump up, and actually hold the valves open.

but you must use pushrods for the type of cam your running,mechanical cam pushrods are longer than hydros....

Thank for all the responses. I've been reading the Sticky on Porting heads and ran across this thread. I have 2 sets of the 273 rockers, but I'm not racing so I may just stick with my stamped rockers. Its good to know I can use the adjustable ones if necessary. :thumleft: