"Hey Kghost, you need to put d
"Hey Kghost, you need to put down the EggNog.
An '86 350 is a Low Compression engine compared to the V8's of the late 60's, early 70's.
You are right about the leaded gas being available at the time , but that was for those that still had the older,high compression motors and needed the high octane, leaded fuel. By 1975, just about all of Detroit engines were bogged down with low compression, emissions, retarded timing, highway gears etc. It was a sad time for performance.
180 is TOO high a reading for an 86, mercruiser.
The book says so.
And so does my rebuilt 260.
Chris"