[1985 CCX]

If you can afford a CSX roller it will certainly be a great choice even over KMS, ERA, SPF and others. Mainly the CSX# at least gives you the right to say it is a real Shelby. If you want ally, or think you might, consider KMS. KMS roller is few more $$ than a CSX glass roller however you will always be able to say "Yes, it is Ally!"

My suggestion on the motor is build/buy a motor with moderate power for the displacement. If you want to turn the key and drive anywhere anytime skip the super powered option. It will be better on gas, run cooler and will be dependable.

A friend with an original CSX said: Today's replicas are much more powerful than the 60's cars. I drove it and agree it feels more like 425hp rather than 500+.

You can get the authentic feel w/o sacrificing power, just don't go overboard.