Big Block Header bolts/Fasteners?

Some of my threads don't look so good on my Brodix RR's. I have the Arp header bolts but I had to clean out the threads and now the bolts are not a completely snug fit. Heads are already on the new block. I looked on summit but can't figure out which ones I need that actually spread like a Poly lock to help tighten the header bolt. Can anyone help me with a part number for this from summit or jegs. Not just regular header bolts. I already have those.

Thanks.