My old school 340 upgrades and results.

Didn't do a whole bunch on the car tonight. Getting close to 100 outside and more in the garage. I did try a couple of different spring compressors. I have a snap on one designed for a Chevy that pivots off of the stud that worked really well. I put a bolt in the shaft tower and rolled it pulled it at a 45 degree angle from the head over the valve. Changed out a double spring in a couple minutes. Much better than last night. I also took the opportunity to measure coil bind of the old springs. Installed height was 1.73. Coil bind on the outer spring was 1.05 and inner spring was .900. The inner spring sits on a raised shelf on both the retainer and cylinder head. It's installed height is 1.513. Tomorrow I will take them down and have the pressures checked and hopefully get a couple new inner springs.