8.75 bearing install and assembly tips

I have the 742 center section / cone sure grip apart, bearings ordered, the cones out for machining on the ends..

I used a bearing splitter to get the carrier and pinion bearings off,, was thinking that I would take the pinion and sure grip sections to a local tranny shop to get the new bearings pressed on,,, then I found a Timkin internet article that says you can heat the tapered roller bearing assemblies to 300 F to aid installation.

From those that have re-assembled a 8.75 center section,, have you installed the bearings by heating them,, or by pressing them on? or does it take both?

How about installing the pinion races,,

any other tips?

thanks