Sorry, never seen an aftermarket Pre-66 trigger. However, those are actually quite fine triggers. The preferred model by many in fact. A bit of polishing, shims if needed, and it becomes very effective.
Here is a bit of info in Articles, if you’ve not come across it.
https://www.savageshooters.com/conte...ger-Adjustment
As for dating: “T” does represent 1966. Does yours have the Pre or Post 1966 Barrel & bolt?
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