You didn't need to remove the clamp holding the bias supply filter.
If I'm refinishing the power transformer on these, I will rivet in two terminal strips on either side of that bracket to hold axial replacements. The tranny covers the rivet heads and it is invisible. Do not go cheap on the bias supply caps. Any failures can be quickly catastrophic to the outputs. For decades I used Sprauge Atoms in these, but the prices got ridiculous and their quality went in the toilet. In more recent years I have been using 105c Vishays in there (601D108F050FP1), which are not cheap, but should take anything you can create in there. A very high quality axial electrolytic. You can bump the voltage values up a grade, but don't go berserk on added capacitance.
As far as the bias supply rectifier is concerned, buy a bridge with a mounting hole, and you can mount it exactly where the old selenium stack sat, on the side wall of the chassis, as in the attached example from a 500C job (an early 2000s job with grounded cord set installed; do not use these orange drops with a stock unpolarized line cord). There is very little to be reworked if you keep the bridge in the same place.
View attachment 1354774