Hi Tyler,
I wish I could help, but I don't know much about phalloplasty.
I could be wrong, but I don't think anybody here has had a phallo yet.
If your scars have healed and they're not that bad, I don't think it'd be too much of a problem.
In case you didn't already know, the radial forearm phallo is going to leave huge scars on your arm/s.
If godforbid your arms are too scarred for phallo, there's always the abdominal flap procedure.
Sorry I couldn't be of more help, buddy.
Good luck.
Nero