Brake rotors for '90 T-Bird Calipers

[EZ$]

When I started my build, I ordered drilled and slotted rotors for a '90 T-Bird rear brake set-up and had to pay to have the hole pattern drilled at 4.5 instead of the 4.25 that was the spec on the T-Birds. I can't find any of the information on those rotors, and don't remember where I purchased them. My question is, can a rotor from another application that already has the 4.5 pattern be used with the T-Bird calipers? How would I determine if they would be compatible? Never really thought about this till now, and figured I'd check in with those that are much more knowledgeable than me.

[MPTech]

This what I was planning to order and have re-drilled.
Part No. & Dimensions: CS-61040

https://brakeperformance.com/brake-rotors/premium-cross-drilled-&-slotted-brake-rotors-black-zinc-coating.php?d=18804

[EZ$]

Thanks for the reference. It'll be convenient since it's here in California. Great pricing too.

[Jrmotorsports55]

I went big and installed 13" Cobra rotors. Re-drilled them to 4 lug myself, not hard if you have the axle as a "template." Videos on my brake upgrades and everything I used/modified on my YouTube channel if interested.

[EZ$]

I'll have to check that out. I did find a company that sells a tool that bolts to the piece using the old pattern and allows you to drill the new pattern. It's about $100+, but it may be the solution.

[rich grsc]

You can find the correct pre-drilled rotors here:
https://www.discbrakesrus.com/make/ford/brakerotorsrear.htm

[EZ$]

Thanks Rich! I'm sure I'd have to give them a call to make sure I ordered the right ones, but they look to be the right idea. Would sure be easier than having to drill them.