I have 3 Grizzly bows, 2 mid 70s Super Grizzly (45x @ 28"-47 under the arrow plate, and a 50x @ 28"). 1 1970-71 Grizzly (45# @ 28"). All three are set up very similarly to yours bow. Just a tad over 8" brace, 5/8" high nock. All have 14 strand B50 Flemish twist strings and beaver fur silencers. They are all quiet and arrows fly well. Nothing under the strings where the limbs touch.
I use wood arrows (Surewood Shafts Doug Fir). The Super Grizzly bows both like 50-55 best. The 45# Grizzly likes 45-50 arrows. They all are 3 fletch 5" shield, Mercury Speed nocks, 125 grain points, 29" to the back of the point, and all weigh over 500 grains total. I have a 27" draw.
Don't have much experience with carbon (bought a few to try, but they didn't shoot any better than my woodies, and cost a lot more). I have had a little experience with aluminum, but although they shoot well, as my friend and archery mentor says, "they sound like conduit" when they hit each other. Wood for me.
I will say that when I shoot the weaker spine arrows with the heavier bows, and vice-versa, it really doesn't make much difference at all, so I think that they may be a bit more forgiving than some bows-definitely more forgiving than a longbow or selfbow.
My vote, if it matters, is get some wood shafts and try them to see what happens. Good luck. The Grizzly is a good bow.
RonP