Originally Posted by Diseasel300

If you have the original #14 head, you could be really surprised how worn the valve guides are. When I had the valves done on mine, the valve guides were replaced. The OEM guides are iron and wear quickly compared to bronze which are more common. Mine were worn to the point of being "wiggly". The machine shop was shocked it ran. Don't waste your time doing valve guide seals unless you're going to do the valve guides as well.

The shaky startup can be injectors or glow plugs. You could also have air ingress into the fuel system. I've dealt with all 3 on my car and they can make for some pretty embarrassing cold starts, especially if air is the culprit.