taking the old ones out was easy enough but the new poly bushings are so stiff i can't seem to get them in no matter what i do!! i've tried a bench vice, a hydraulic press, even running a bolt through the bushing and link with washers on both ends hoping when i tightened the nut down the washers would force it in the link but nothing has worked so far!! and yes i've lubed them plenty hoping they would slide in with a little help but no such luck. any ideas??? someone told me today that he's heard of people freezing bushings and then putting them in b/c the cold makes them shrink a little. has anybody had any luck with that or any other ideas??  

ya sure ya have the right ones. the poly replacements I've used practically go in by hand...  

they look like they are but maybe not. are the holes in extended links smaller than stock links?  

Now it's making since. You have extended links?

I have right here in front of me stock and a JKS extended link. The stock eye is >1.125" and the JKS is 1.125". What is your link eye dia?