When parted out my 2Gb Spyder, i don't recall having issues removing heater core. I'm pretty sure all heater cores are likely same for all 2Gs However, everything was removed at that time including blower, ac, etc. You may very well need to remove more parts. Since it's mostly plastic, you could push/pulls different mounting points on the core and it should lead you to tight spots that likely have another bolt that you cannot see.
Edit: Can't edit previous messages for some reason. Transmission and t-case sold for asking price, was offered more but it's not a bidding war, first come first served. Lowballers ignored. Thanks fellas
I have a set of RTM stainless steel braided brake hoses for the front of a 2G DSM. They are black in colour. I don’t have any pics right now, but they’re in good shape. No banjo bolts. Asking $30 for the pair, located in Brantford. Can mail out at your expense if desired.