These were on our 86 H/T and were removed to put on a flat cushion. They don't slide open, looks like previous owner changed the rail system maybe? I'm not familiar with the sliding set up so can't say. I'm not sure what they are even worth, anyone is welcome to chime in or message me about...
I'll give this a shot, but...I need some clarification on your terminology...
When you say "grind"...do you mean actual grinding sound from the starter or grind as in extended engine cranking to get it to fire?
When you say "hand advance" the motor...do you mean advancing the timing by turning...
2007 PCM Chevy 5.7
Crankshaft position sensor mounted in the bottom of the timing cover.
Does the timing cover have an oil pan seal on the bottom or does the oil pan need to be dropped to remove the timing cover?
I can't tell from the PCM parts manual breakdown.
They show a "cover...
I doubt the arm is threaded, the one in our 26 wasn't.
If you can get the arm off the rudder post, put it in the freezer for a few hours, the cold shock might break the corrosion bond.
HEY... what's a wire nut doing in a boat???
I'd check fuel pressure under full load first. - mechanical or electric pump?
You say Holley carb... assuming a 4 barrel? - mechanical or vacuum secondary's?
What distributor? - what kind of spark advance?