Start the engine and bring to break-in rpm.
Slow idle speeds may result in severe cam and lifter wear. The results was just a little more HP, but the mileage increased about 10. I stayed with single exhaust because it is in a van, but increased the pipe size and used a Flowmaster muffler. Do not allow the engine to run under 2000 rpm for the first 1/2 hour. I built a Chevy 350 using the 1.94 heads, Edelbrock cam, 1.6 roller rockers and the best parts I could find.
Coat cam lobes and bottoms of each lifter with MoS2 lube (supplied) to prevent cam lobe and lifter wear from occurring during initial start-up. Oil/additive must contain Zinc designed for use with flat tappet camshafts. In order for this Performer-Plus cam and lifter kit to be covered under ANY WARRANTY you must use either the correct Edelbrock Sure Seat valve springs or the stock original equipment valve springs. This cam has strong low end torque for daily drivers and good mileage.
Recommended Valve Springs for OEM heads: Edelbrock part #5802 non-rotator/# 5902 Rotator 50-state legal E.O. This listing is for a cam timing kit compatible with 1955-95 SBC CHEVY 350 HP RV stage 2 420/443 Lift flat Tappet( NON-Roller) camshaft & lifters kit with an adjustable 3-Keyway Crank Sprocket with:-4 degrees to +4 degrees Cam.For more information, visit Installation Notes After that, I have always had a soft spot in my heart for "RV cams".WARNING: This product can expose you to Chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. Pulling the trailer, we were lucky to get 6. Foolishly, I got rid of it when I had a chance to buy a low mile RV with a 360 Dodge. Best thing, it got 12 MPG pulling the car on the trailer. I remember coming home from the Fairmont race track on Hiway 60 south of Mankato, and going right around a friend of mine who had the same kind of a race car on a trailer behind a motorhome with a 440 chrysler in it. I put this in with new lifters and a properly redone head, and I couldn't believe the difference. In the meantime, I found a good deal on a new Sig Erson RV grind cam from Dale Wilch. I pulled the head and had it redone (thanks Gordy). Turned out, the guy who did the valve job botched something with the valve rotators which caused them all to burn. Anyway, my buddy rebuilt the engine (typical ring 'n valve job) and it ran pretty well for 6 or 700 miles when things started to go sour. After a couple of years of fighting this thing, something (probably a broken ring) went, and after putting in a quart of oil every 50 miles, we finally got home with the back of the RV COVERED in oil. I used to have a 1970 Winnebago with a 300 Ford 6 I used to haul my vintage dirt track car around.
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