that .440 sifton cam if it did in fact say .440 on the last lobe - now theres actually 3 different .440 siftons -- they have #'s on the lobe like #112 -- #107 and #109.

lets say you had the real sifton 440 -- that cam was for engines 86" to 93"

sifton 440/109 performs best in 86” and 93” motors with 4-Speed --

Intake: 32.5/50 262.5 0.440 Exhaust: 58.5/30 268.5 0.440 Overlap: 62

that cam in a stock 74 even a 80" is a dog of a cam - wayyyy over cammed -

I have removed several of them most the #109 it never makes power oh it will run but you never gonna see the power band -- also these cams with long duration need no less than 10:1 cr and lots of cubic inches --

the sifton cobra was the most popular it had #112 on the lobe -- it had a power band of 2500 to 5000 and was good for engines up to 86"

so what one did you have?? the #107 (.440) was a hyd lifter only cam

 

ALSO GREASE ISNT THE BEST LUBE -- CHAIN OIL THATS MADE FOR CHAINS IS -- AND AN "o" RING CHAIN -- AND ONE OF THESE -- THIS IS A DREAM TAKES THE CHAIN WHIP VIBRATION OUT