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I only check one intake and exhaust per head, if I do the valve job, just to verify all is what I want and where it should be.

kerosene with a little ATF for color

McLintock? Makes me think of my brother Mark.

Any luck with getting the fins? I'd go in for a set.

Don't be afraid. Get the right tools, take your time check everything 3 times. Tools are not expensive to do this. We can get you through it.

I have them measured and modeled. I just need to make a drawing now. Maybe today

I'll get you some measurements.

I can measure originals if you want for wire holders and anything else. Great idea.

My Magnum heads are not cracked. Magged OK. I doubt they will crack unless I overheat them, and that is highly unlikely. You could usually tell LA heads that would be cracked by core shift, or stuck closed exhaust manifold heat valve. My Magnum heads will do light duty: 180 thermostat; and...

They are not all cracked. My 318 magnum heads were not cracked.

So cubic money does not always win. In lesser engines, the higher horsepower also leads you to buying aftermarket block, rods, and crank to survive the increase in power. I like the iron heads for being bullet proof and more dimensionaly stable. You have to decide what cam you can tolerate...

Magnums came with 5/16, .3125, Diameter stems, OR 8mm, .315, Diameter stems. The stems on any engine should be measured with a micrometer and guides sized for appropriate clearance. Never, would I run any heads that I did not check a couple of valves with lapping compound. Even the Best mess...

Sounds like ignition or fuel if 150 psi an all cylinders.

Try a compression check, to rule out a bad valve job. EQ heads sound great, as is. I would always get a good valve job, worth every penny. I used to rebuild a lot of engines. "Rebuilt" engines, I never trusted and with good reason.

I think a lot of the low wear on modern engines is due to premium materials and machining. I noticed a difference in wear between standard engines and HP, High Performance, engines. HP 360's and 340's would typically have less cylinder wear than standard 360's and 318's. The HP engines had...

Actually, in 75 318's were so clean some did not come with Catalytic Convertors. As far as I know they were the only ones.