replacement seat belt bolt size

[65TerrorCuda]

Hey y'all,
I've got some frayed but original belts I'm looking to replace in my 65 Barracuda. I've seen belts on Legendary but am wondering if they are direct bolt-ins. Anybody got experience?
I read online that someone had to use 65 Mustang bolts with aftermarket belts.

 

[mvh]

I would expect they are the same. I bought replacements from Seat Belt Planet and they used the original bolts. Legendary is probably higher quality.

 

[65TerrorCuda]

I bought a pair of 1965 Barracuda specific belts(about $200) and received 9/16" holes while my originals are 11/16". The vendor is telling me to drill them out. Keep em and change out the bolts? No way am I drilling out the chromed steel end.

 

[65TerrorCuda]

Any ideas? I'm a little nervous drilling this hole 1/8" bigger