body mount help!

[rayninglead]

Didn't know where to post this but here goes. Ijust put a 3"body lift on my 98Yukon both of the rear body mount bolts snapped off flush I've tried everything from heat to drilling them out and its been kicking my ass. So the only way I can see me getting them out is through the floor what I need to know is how are they fastened in? Any other suggestions would be great but I'm tired of dealling with this need it back on the road asap

 

[SunlitComet]

they fasten thru nuts that are in most case welded kinda to body side mount arm. Gzes just welded on sacrificial bolt to turn the bust ones on his i think.

 

[rayninglead]

Itried welding a bolt on to what was left it wouldn't ********* good enough to work for me I've been trying to get these bolts out now for 2 weeks and it has beaten me with everything I've thrown at it so I'm thinking of cutting an access panel above the bolts and blowing them out with a torch and putting a nut and washer in there but didn't know what kind of fastener was under there before I start cutting my floor up lol