Once you get it apart - tab it anyway - if you have the stepped cover you will be able to tell if it doesnt go back together properly. Make sure you use Loctite (blue probably). Next will be the rest of the bolts that hold the timing case on. Remove them one by one, clean it with brake cleaner, allow to dry, apply loctite and reinstall. Some of the bolts may not be accessible and you may have to turn the engine over some to get to them.

#53 block info is here - including some pics of mine:

53 Block FAQ and Information

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98 12V quad cab 4X4 AND 2001 24V quad cab 4X4

thanks Doc nice link
But when you say ''if you have the stepped cover you will be able to tell if it doesnt go back together properly''
What do you mean by this will I need a different cover?? Or dose this mean I have a 53 block??

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The newer style cover won't work with a tab kit. Once you install the tab kit the new cover won't fit flush on the front of the motor because of the tab holding it out.

I wasn't smart enough to do it but maybe one of you other guy's gettin ready to do this can take some pics of the back side of this cover to show others what they look like.

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374.2/846.7 at 30psi