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04-25-2017 02:44 PM #4
Welcome to CHR!
As Tech mentioned, you probably have too much cam for the compression of your engine. There are several ways to address this, but all involve pulling the engine and getting into the insides.
Do you know what the engine originally came out of? The ‘86 K10 was a small block (305 or 350) with the 454 available in the one ton chassis K30 or V30 (van).
The engine block casting number is found at the back of the block where the transmission mounts to the engine. You may need a mirror to read it, but that would give us an idea of where the engine started its life. I’d hate to see you put any more money in this until you know exactly what you have.
Again, welcome!
Glenn"Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil
And from here in the Ozarks a Happy 4th of July
HAPPY 4th