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I checked all 8. Spark plug electrodes are tan and look normal. Car runs like a top. Really excellent. No knocks or pings. It eats thru valve cover gaskets and is now ruining paint on my new AMD stock valve covers.

Cork gaskets did dry out and leak. What brand of high temp primer and paint did you use? I have not had problems with the intake manifold. Fel-Pro 1215 valley pan block heat x-over passage. I had to use heat socks over spark plug boots by outlet passage of manifolds. Melted #7 wire and...

Did cars with HP manifolds come from the factory with these gaskets? If not, was 1960s paint stronger? Doesn't seem like that would be true, but quality often sucks now.

I have never had heads knurled. Our cars don't get driven many miles, so maybe it will work. OTOH, I have been reading Mopar mags for 30 years. Every article on the subject opposes knurling and endorses new valve guides.

I have HP Exhaust Manifolds and I'm trying to switch to stock 1970 Valve Covers. I used Chrysler Race Hemi Orange to paint the valve covers. I did not use primer. Clearance on the right side from HP exhaust manifold 2806900 to the valve cover is tight. After 30 miles of driving, I had burnt...

Ditto: Bronze Valve Guides! Knurl is cheap short term inefficient fix,

Vacuum seems low. Manifold Idle Vacuum in most street motors I've owned is 15-17HG. Vacuum leak? Engine mounts could be weak?

Skirt is offset from the wrist pin/piston pin 90°. Skirt wear may happen when there isn't enough clearance between piston and cylinder wall. Or the piston got too big from overheating. Or the piston is installed backwards, so the wrist pin and connecting rod offset is wrong. That makes a sound...

Your harmonic balancer is junk. For $140 you should be able to buy a new one.

Hi Rip, 516 is closed chamber 79-80 cc. 1970 383 originally had open chamber 906 heads 88 cc. I was also thinking about compression and wondering whether the transition to closed chamber would cause knock. It's not my engine. I was talking to another guy. His 1970 383 has run fine with 516 heads...

Hi rds Transmissions are heavy. To avoid shipping costs, you may want to stay local. I suggest that you take pictures of the RV trans - front, rear, and sides - and post them to this thread. We can help you with whether it needs mods. Ben

Big block bell housing looks circular. You need a big block trans for that 383 V8 Newport Small block looks flat on passenger side. Also torque converter cover bolts location and starter location are different on small and big block bell housings

516 head castings have the small exhaust valve 1.60" versus 906 heads which have 1.74" exhaust valve. Do you think 1.60" is enough for a 1970 383 mild cam, stock compression, stock trans, street cruiser 3.23 rear?

10.4 compression is high for a street cruiser. I have read that you can go with higher compression with aluminum heads, but still I think you will have a problem using only premium gas. Racers use higher compression with a bigger cam because of decreased cylinder pressure, but a race cam may not...

What company did you buy them from? Thanks

What gasket silicone did you use? Thanks!

Thanks, but Moroso 93055 are already installed on my car, so I am going to at least try them. I was asking Welder Guy about torque before I run the engine for the 1st time with the new valve cover gaskets.

1970 Fury Convertible 440/727. I spent a lot of hours cleaning, priming, painting, and installing stock valve covers. Aluminum not an option, although pics would be cool to see. Stock valve covers torqued at 40"lbs. I may have overtorqued, but Moroso generic directions are 80"lbs. Of course...

Did you use the Moroso recommended 80"lbs torque? Or did you go with the factory torque of 40"lbs? Thanks!

On my 1970 Fury 440, factory 4bbl manifold, I did use the fiber gaskets. I wanted extra leak protection. I did not paint the valley pan or use fiberglass. I used Permatex Ultra Gray RTV on the top of the block at the end bars.