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Two sets of valve springs available, specs following:
Crower inner and outer interference fit, no damper on this type spring, old p/n 68100/68201,
180 @1.700, 335 @1.200, 380 @1.100, coil bind @1.060.
General Kinetics inner and outer w/flat wound damper,
175 @1.700, 360 @1.200, 410 @1.100, coil bind @1.060.
$55.00 plus postage either set.
I didn't say! The numbers posted in the first post were personally verified by me at the time the springs were put away, these are actual tested pressures and not advertised numbers. The General Kinetics (G/K) springs were run several seasons on a mild build "E" block with an off the shelf G/K solid lifter camshaft. Don't remember the specs on the cam but was probably about 310/310 advertised duration and in the low 500s lift. Pontiac 1.5 ratio rockers were used. The Crower springs were used on a later build of the same E block but with a Comp Cams 600 lift custom grind solid lifter camshaft and Harland Sharp 1.6 rockers; had break in time on them and 3 or 4 passes at the track when burned a piston.
