1. tape deck > UA5's rca line inputs (on rear)
2. record digital master at 24/96 (set "ADV" to "on" located on rear of UA5, set sample rate to 96k on front of UA5).
you could also cross-fade the tape flips, intro/outro fades, gain, EQ, resample and dither to CD quality 16/44.1,...
make sure you back-up the 24/96 master before doing any DSP/editing.