Replacing the ABS Unit- Any Advice?

[gearshift]

I am replacing the ABS Pump Unit on my 89 Vette. The modulator valve went out, so the whole unit has to be replaced. Has anyone done this and knows of any thing to watch out for? The project seems fairly straight forward- unplug the connetctors and remove the brake lines, then reverse order and bleed the system......

My manual does not cover this unit.

Thanks.