pump timing

[chuck-b]

I am in the process of replaceing my timing set and injector pump on a 1992 3500 gmc 6.2 with a banks turbo. I installed the new timing set and noticed the pump drive gear on the cam is out of time by 180 dregees give or take one tooth. do i rotate the engine to aline the timing marks on the pump drive gear or leve it at tdc and try to aline the marks 180 out my gm manual showes the pump timing marks alined at tdc. Any thought's

[BobND]

After you've made sure the cam timing is lined up, rotate the engine, and line up the injection pump timing marks.

[chuck-b]

thanks for the help