I appreciate the replies.
I measured the DCR of the pickup on a friend's Squier P-Bass (a decent instrument I guess), and it was about 5.8k. When I saw that, I figured there wasn't anything "special" about bass pickups (look at the different shapes--humbuckers, split on a P-bass, thin single coils like a Jazz bass). Mine is sort of a P90--a wide bobbin, 8 screw polepieces. There will be a bar magnet underneath the bobbin on one side of the screw-ends, and an iron spacer on the other side to "help spread it around".
A related question... what would be the effects of using a steel baseplate for the pickup? Would it "help" the magnetism or dilute it? Since it's not a humbucker (w/different magnetic poles being used by the pickup), I think it should be fine.
I'm inclined to solder the ends. SwedishLuthier--thanks for the point about the size of the solder blob. I hadn't thought of that.
I'm not sure how far along I am. I'm not counting windings--just winding till the bobbin is full. I gave myself plenty of bobbin room, so it should have a good DCR. I would say it has between 200 and 500 windings on it now? My system is "ghetto"--the bobbin is fixed to a plate w/dowel which goes in a hand-drill chuck. The drill is clamped down to the bench. The roll of wire hangs a few inches away on a broken drumstick which is also clamped down to the board. I have to be careful with the drill speed--it got a little too fast, I think, which is why it broke. I set the drill throttle "low" so that the speed is more controlable.