Joe has it right the HF puller works like a champ for 10$ If you tighten it and it doesen't pop tap it on the side away from the machined surface. Also tighten it and walk away for a few minutes and then tighten it a little bit more works most of the time. For anything rusted PB Blaster or similar spray and let it sit overnight then come back to it. You didn't say where the pedals are stuck? Is it the large assembly off the frame or the fine thread bolts that hold them together right behind the firewall?