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I call this my Cobra Jet cam
Grinder: Bullet Cams
Intake: Lobe #H275/318
Exhaust: Lobe #H285/324
275°/285° advertised duration
280° average duration
225°/235° duration @ 0.050
0.550"/0.560" valve lift
Exhaust valve opening = 80° BBDC
Intake valve closing = 70° ABDC
115° lobe separation angle
Intake lobe mathematic centerline = 112.5° ATDC
Exhaust lobe mathematic centerline = 117.5° BTDC
That's all the info Bullet Cams needs to grind you a cam. Don't let them talk you into tighter lobe separation. Ask them to give the cam their best heat treatment and their best polishing. If those lobes look familiar to anyone, those are lobes used by Lunati for their Street Master cams. Evidently Bullet Cams grinds some of the cams for Lunati. The businesses are located 6 miles apart in Olive Branch Mississippi.
Those are assymetric lobes that open the valves a little more quickly and set the valves on their seats a little more slowly.
This is not a generic camshaft spec, its my personal Cleveland spec; its not an amateurish aftermarket piece of poser c**p either. The timing events are where they need to be to do everything right for a regularly street driven Cleveland that exhausts into mufflers. The lobes aren't as aggressive as Lunati's voodoo cam lobes, they're a step down from those lobes, but they are still pretty aggressive. With the carburetor and ignition dialed in you'll be amazed by how your Cleveland runs, amazed how nice it runs around town, how hard it pulls when you mash the pedal, and how high it wants to rev. Charging Rhino time! I have one more cam spec more aggressive than this one by the way, I call it my Boss cam.
For springs I'd like to see 120 to 140 pounds on the seat and 330 to 350 pounds over the nose. Lunati's #73815 or Isky's #8005A are possibilities if you find you need new springs. The Lunati spring, at 308 over the nose, is a little light for heavy valves. It may be OK new, but as time goes on you might find valve float creeping up on you.
Lunati #73815 .......... 120 lbs seated pressure, 342 lbs/inch spring rate, 0.570" maximum lift, 1.820" installed height
Iskenderian #8005A ... 135 lbs seated pressure, 395 lbs/inch spring rate, 0.650" maximum lift, 1.875" installed height
I don't know if your motor has factory rocker arms or roller rockers, but 350 pounds over the nose is about as much spring force as the factory fulcrum set-up can take. If your motor has the factory rocker arms, and you plan to use the Isky springs, do your motor a favor and purchase the best possible replacements for the factory fulcrum clamping bolts from ARP.
For hydraulic lifters I recommend the Speed Pro HT-900 lifters which are/were made by SEC/Johnson Lifters. These have been around a long time. I'm not sure if they're still made, but I've found them on eBay. I don't have experience with anything else. If your motor has adjustable valve train you may want to opt for the anti-pump-up version, part number HT-900R. The guys at Bullet Cams may have a good lifter to recommend. You'll enjoy doing business with the Bullet Cams guys, they are friendly, smart, helpful.
You're also going to need something better than the factory push rods. Your motor shall be using more spring force and turning more rpm than those factory push rods were designed for. Figure out what length you need and have the Smith Brothers in Bend Oregon make them for you. 5/16" OD with 0.120" wall thickness. The 0.072" passage down the middle of the push rod will do a good job of metering oil to the valve train too.
Do you know what you call a Cleveland push rod with 0.120" thick walls? An 8 inch stiffy.
there'll be phantoms, there'll be fires on the road... and the white man dancing