Intro from an old Assembly Plant guy

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Keith,
Probably missed it here in reviewing your posts, is your 87', a V6 (rebuilt?) and what rear ratio do you have. Questions in reference to my 86', C10 SBSS barn find, 108K miles, 3.08 rear, that has been stored around 20 years. Started it on 2.5 gal gas can in engine compartment (not sure of the condition of original gas tank, need to check it out before using. Replaced hydraulic clutch cylinders and line- they leaked. Engine started easy, runs kind of rough. Replaced plugs, runs some better. Plan to run some Sea... top engine cleaner through it to see if that helps. Thinking the intake valve seal are probable pretty dried out, and some of the exhaust valve likely have lots of rust on them from long storage ( leaky exhaust valves not as important as intakes). It smokes a little when running, however, reving does not generate more smoke. Have not changed oil yet, so not sure how thick the oil in it now is, will see if smokes more w/ new 10-30 ( will probably add some marvel... to the new oil). It has a tall intake along w/Q-jet carb).

The question on your rear ratio is generated by your pics showing 87' towing 73', does your V6 do that?

Still thinking about engine question: keep V6 and repair as needed or replace w/stock looking V8.

thanks,
Les