NAPA or any of the local stores care Lubriplate assembly grease,
http://www.lubriplate.com/products/greases/no-105-motor-assembly-grease.html
Use plenty of it, and use plenty of camshaft assembly grease,
http://www.compcams.com/products/250-267.pdf, or your choice of cam manufacturers. Use plenty of this stuff as well.

Its best not to wait to long to start the engine after assembly because the cam lube will run off, and with the oil problems now a days, you need all the cam lube you can get.

Read up on oils if this is a new camshaft, your engine isn't like a full on race engine with tons of valves spring pressure, but you still need to be aware of the dangers and concerns with modern oils.

Joe

1937 Chevrolet Inline-powered Streetrod