273 rockers on 340 with hydraulic cam

BillGrissom said
I installed a hydraulic camshaft in my 1965 273 engine, a fairly mild "RV/Torque" camshaft (still has slightly more intake lift than factory HiPo camshaft, I recall). I bought standard pushrods for the 1970's 340 TA engine, which are similar ball & cup type as my factory pushrods, but just shorter to fit the hydraulic lifters. Might work for others using fairly standard parts like heads which haven't been milled much.

Good point. If it's a stock engine without many modifications and a mild cam, the non adjustables are fine. If you upset the apple cart with changes, you will need to measure and get the right pushrods. Using adjustables on a stock/mild engine won't gain you any horsepower, or very little.