All Holley parts will fit all Holley clones. Holley fought competition for decades because they produced straight crap. It took Barry Grant a several law suits to break that monopoly.
Don't give up on the TR. when it's right, it will blow away any single 4 everywhere in the RPM range.
I wont giving up on it as not easy beat but going to run a single as get limited track time and but tr on as and when i fell like it and track time allows