does anyone no what dyno should cost 350 sb
thank you

I was told $500 and that did not include R&R.

you mean dyno time??? around here we pay $350-500.

how long do the run the motor?

depends....most warm things up do a pull maybe 30 seconds read the read out make some changes maybe jetting,timing, what ever pull it again usually when I've seen it done they make maybe 6 pulls takes a couple hours. it takes longer to put the thing on the dyno then to do the pull. Money well spent....my .02