FYI...
Some A2Ks, notably the "BSW" boards, require that the 68K be pulled when an accel card is installed. If you just want to have one around should you want to remove the 2630, then go ahead - but be warned your accel may not work with it installed (it won't hurt anything to try it out).
Also, I have a couple lying around, as I would replace them with a 68010 any chance I got. The '010 is a drop-in replacement, and you can use that, too. The speed-up is hardly noticeable (typically 2-5% on some things), but most chips you'll find have the ceramic package, which is why I like them (heat tolerant).
banzai