Turn my Crank or not

[Solver]

Was going to rebuild an engine and just getting started.1st one!
Stopped at the machine shop today to get prices for machine work.
Price to turn my crank is $95.00 and then $45.00 if I want it polished.
$35.00 to steam and check block and another $113.00 to bore if needed
Stopped at the auto parts store next and they will sell me a rebuilt crank with rod and main bearings for 82.99 (plus&Minus) $40 for core.
Or Northern Auto parts sells rebuilt crank for 79.99 (plus minus) 51.75 core Never rebuilt an engine so not even sure my crank is bad so kind of stumped on which way to go.
Not a motor head but figured since I already have the 350 in the garage I would give it a try.Already have some 882 heads I got that are all ready to go. Also have an old 305 that I might be able to use the crank out of as extra for core so I can keep my original 350 crank. Are they close to the same?
Which way would you motor heads go?
I just want a stock rebuild with nothing at all fancy just reliable!