I pulled the radiator core out to restore it and will pull the front frame as well. Regarding replacement core support mounts I see Classic offers a kit for $99.00, National Parts Depot has two kits; Repro @ $65.00 and GM @ $118.00. Summit has a Original Parts Group RB0523 - Original Parts Group Radiator Support Bushing Kits for $30.00 and a version Goodmark 4020-326-67S - Goodmark Radiator Core Supports for $39.00 and OER K3029 - OER Radiator Retainer Pads for $19.00. Thats a pretty big spread in price but price aside I've got this torn down and want to put a quality rubber set back in.
I would be interested in hearing of a quality set for both the core support and frame mounts based on experience of having replaced them yourself.
v/r
Dave