Have a Regency HR-2A that I want to re-crystal for packet
use

Raymond-

Receive crystals are in the 45 MHz range, series resonant minus a few Hz, (Fr -
10.7)/3. There is no adjustment, so you must replace the crystal if it is too
far off frequency. The stock IF filter is fairly broad.

Transmit crystals are in the 6 MHz range, parallel resonant, about 20 pf, there
is a trimmer capacitor.

One of the guys around here put one on packet and claimed good results.

73, Fred, K4DII