I see nothing wrong with that setup - though I don' t know about spine on those arrows.

Just a few things you can look at to make you and your bow better:

Drawlength - Are you close? right on? Too long or short can cause form and accuracy problems. See a pro shop or do a search here on drawlength, there are a few methods to figure " in the ballpark" drawlengths.

Bow timing: Its an old bow, are the cams timed? are the strings new or old? They will creep and throw the timing out of wack. This will hurt the bows performance and make tuning broadheads much harder. Find the original manual to check all specs on the bow or bring it to pro-shop. A new top quality string and cable can make a great improvement in performance and forgiveness.

Shoot broadheads and shoot them often. Tune the bow to shoot broadheads and practice with them.They are a different beast than field points and need special care. See Eastons website and download their tuning manual - great info!

Are your fletchings offset or straight? feathers or vanes? I would suggest 5" offset feathers for your setup and rest.

Good Luck