If you have a carborater on the engine remove the air filter housing to expose the carb... with a small hammer (no realy) tap lightly on the front part of the carb, closest to the rad and try to re-start. The float could be stuck open and this will help to release it. The carb may need a re-build...
I would replace the ignition module that's under the distributor cap.
Yes.
replace the catalytic converter
No, not without changing the front fenders as well.
can I put a 99 Chevy 4l60e transmission in my 86 k5 chevy blazer
unleaded. 87 octane unless in high alltitude
It is mounted on the TOP of the STARTER.
possibly you have a leaking cooling line from your trans cooler or radiator
i have 2004 blazer in ammman Jordan not more than 87 miles per gallon.
4x6 in the dash and 6x9 in the rear
3.73 if you have a 350good engine and automatic transmission
T55