Another tip,i have been messing with gm points systems for over 37yrs and found that the rubbing blocks wear failry quickly on most point sets (esp accell with heavier spring) so you have to check the dwell fairly often,not a big deal takes 5 mins but to some people that would be considered a PIA.
But what i did find over the yrs was that when i used STD IGN PRODUCTS /BLUE STREAK points DR2270XP good for approx 5k rpm and maybe a smidge more or DR2371XP(h/duty spring ) good for approx 6,500 rpm in a stock gm points dist in good cond thats not sloppy that these point sets would run a heck of a lot longer before the rubbing blocks would wear enough to require a dwell tweak.
I would install a set of those points in my car and then let them kind of take a set over a few hunderd miles and then i would check/re-adj dwell a 2nd time at that 200 mile mark.
Then i could go a complete season (May-november/mostly weekend use only) without
having to set them again untill the spring of the next season.
I have owned my car for 30 yrs and have litterally been through 4-5 sets of points tops in allthat time. And i never replaced them becasue the car was running poorly ,i did it as preventative maint and i am running a mild 396 that at one time had enough cam for 6k rpm shift points but now it has a milder cam and gets shifted at 5,400-5,500 rpm tops.
Dwell spec is 28*-32* so for a tight/not sloppy dist shaft run 30 deg dwell but if the dist is worn dont use 28 deg dwell because in some cases at hi rpm that could cause the points to open too far due to dist shaft slop resulting in misfire.
Another thing you should do when running a stock points system is run good quality lo resistance spiral core plug wires along with low resistance copper/brass terminaled cap & rotor.
You should also run the little hotter then stock pertronics 40k volt coil(stock coil is 30k-35k volt max) that looks stock and is same size a stock gm points coil too.
Running these good quality low resistance ign parts with a points setup really helps it to perform better. I setup my friends Pontiac 469 that 'spretty hot shifting at 6,400-6,500 rpms with never a misfire. He was very surprised at how well the old points system would perform when setup properly with the h/d spring blue streak points f(or longer run times inbetween dwell tweaks)along with the high quality low resistance ign parts. Doing those things realy helps to beef up the stock points ign system esp all the low resistance parts like spiral core wires & copper/brass terminaled cap/rotor to allow a lot more current to the plugs with the hotter 40k volt coil to back all that up.
So go to your local mom and pop indipendent auto parts store and they should be able to order the std/blue streak points for you ,i would think autozone/advanced auto/pep boys should be able to to get them too. Acell makes good cap/rotor with brass/copper terminals but napa & std ign products also makes them. There are many mfg that make the spiral core wires so that your choice. But if stock look is important then pertronics make a good set of stock looking black wires that i have been running since 2002 with no issues thus for with stock ex manifolds on my 396.