MOTM

I am assembling a 440 kit I got a long time ago.   The instructions call for 3 Spectrol 248J 100K pots.   In my parts bag, I don't have 248J pots, I have 3 148 pots.

I think I may have a parts mixup, I assume I cannot use the 148's in place of the 248J's?    Is that correct? 

Thanks
Andy