OK so I bought a Freewheel Hub and an 18 teeth Freewheel....both pictured below. Now my question is, after getting the hubs on some rims and spoked up can I just place the SS Freewheel directly on the hubs without having to place spacers....I can't see any extra space on the threaded hubs for spacers. Wouldn't this make the chain from the front to back misalligned? Please help.

It's a singlespeed hub so spacers aren't necessary because it is designed to align up with the chainring on a singlespeed bike/crankset. If you are converting a geared bike then you may need to try a different length bottom bracket or try the chainring on the indside or outside of the crank arms.

chainline isn't that critical with freewheel bikes. unless it's way off (like installing a triple crankset and triple BB and then using the outside ring on a bike with 120 rear spacing), you're not going to have any problems.

Thanks All......I just had the hubs installed with some Alex Rims and Trued....you're all right. It didn't make for a hard installation. Thanks again.