I usually start the week before and pb blast them every day for the week then they would cone out. Last time I replaced them with stainless hardware. Came out really easy last week when I dropped it out.
Might try a torch heat it til it's red then break it loose.
When all else fails cut them then drill out the studs and replace with new hardware like I did.
CMP Drag Racing
best ET: 12.410 -- best MPH: 107.61
NMRA MM7270 -- NMCA EFI/? ????
Thank you to the CMP Drag Racing team: Tony, Doug, Maryann, Dale, Paul and Chris.