Quote:

Find a set of pushrods out of a '70's 318 motor and try them for a test.

Those wont work because they are a ball ball pushrods and those rockers require ball cup pushrods,

RIGHT you are, my bad! I was thinking 318 would be the right length, but forgot about not having the cup even though we were talking about 273 adjustable rockers. Where's the geezer icon! Problem started with hydraulic lifters that are different height than the original solids. Does the OP or anyone else have the original 273 solid lifter to measure its height against a hydraulic that is in there now??

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph