1st, whomeer told you straight pipes &/or glass packs "can & will blow a motor" is blowing smoke up your nether orfice.

So, your choice is really a matter of personal preference. If you like it loud and you want to keep your neighbors and the local police off your butt glasspacks will do the job.
If you're wanting a little thump but not too much, there are turbo mufflers out there that will give you a nice note without being too loud or too quiet. Thrush and Magnafow are a couple of my favorites.
If you really want to have some fun with people you can run regular mufflers with manual cut outs. Nice and quiet for around the neighborhood, and then when you want to make some noise you pull the knobs and presto, you're running a straight pipe. However, much like running straight pipes, if this is going to be licenced regulalry and not as a collector car running either straight pipes or cutouts may be illegal (in the Peoples Republic of California, I'd say it probably is), best to check that out.

Once you figure all that out, talk to some folks in classic car clubs around your area about who does the best muffler work and take your rig to them. A decent shop can give you a good deal on new pipes custom fit to your truck & they'll last for years.

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P