What Cam??

[wxman1]

I bought the blue beast several months ago. Previous owner said
the engine had been rebuilt and that it had a comp cam put in it.
Did not have any specifics on the cam...I think a buddy of
his actually did the "rebuild". Any way...the engine seems to
run ok...except that it idles sort of rough. Seems to lope.
The lope gets rougher in cold weather. My brother mentioned
that it might be a "3/4 cam". Ive tried calling the guy back
to get more info but his phone has been disconnected.
So I'm wondering how big a job it would be to replace this cam
with the "stock" cam. Or possibly would the engine idle better
if I played with the timing?

Any suggestions are appreaciated!

Jim M.
Mt Juliet

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69 C10 Fleetside
350CID/TH350
3.73 rear end