Timing Chain Choice

I recently bought a new set for my 383. I got a summit billet true double roller;the price was right (just under $70) but had to be tweaked. Nothing was majorly wrong, but the cam gear had slight burrs on the teeth from maching so I cleanedthem up with a dremel and a file. I checked and the small block part #sum g6603-b for billet $67.95. non billet is sum g6603 37.95.