Mazdav

hey everyone, wondering if i could catch anyone's attention, i recently purchased an 82 rx7 gsl, and it idles pretty good, and does what seems to be a misfire and shakes a little. when you drive it down the road it seems fine for a minute and then about 5 minutes in it starts to bog down and will die, i don't think it's a fueling issue because before it bogs i can rev it up to almost redline and after i let it sit for a few minutes it fires right back up and runs good again for a minute. i went through and set my ignition timing, and ordered coil ignitors and also distributor cap and rotor ( because contacts are disgusting) any thoughts ? new spark plugs are in it as well