[ChevLoRay]

So, how many miles on the clock? My 350 is the original block and the odometer shows 11K. It could be 111, or 211K for all I know. The heads are later. My engine has some blow-by. Is mine tired? It's got some issues, I'm sure. Like I said, blow-by, leaks oil from rear main. I would like a crate engine. I have several people who want my engine. Maybe I should re-think, huh?

I'd run a compression test, to let you know "stuff".

As for plugs, my engine is running AC RapidFire. It used to gas-foul plugs when I had an Edelbrock 1405 on it, with an adapter to fit the carb to a Q-Jet manifold. I now have an Edelbrock 1901 on an Edelbrock Performer intake. The mixture is a lot leaner with the new carb/manifold. The old HEI that was from a junkyard died, and I replace it with an ACCEL HEI, that is a reman unit with their name.

My thinking is that you get the fire right, and the carb right, and it will be a good engine. If it ain't knocking, and the compression is good, you should be good-to-go.