considering Trex but want to install as soon as possible and not willing to wait for bearing install. how long would my main bearings, rod bearings last. for right now only considering reving to 6200 rpms? how about revving to at least 6500 rpms??

 

Bearing installs always end in 402 engine builds or some type of engine build. If is not broke don't fix. Because if you do not have the money to do it right, new rods pistons etc. then do not tear into it.

 

As long as your bearings are ok now, you shouldn't have a problem installing the cam and rolling out. People run their stock bottom ends past 6500 all day every day. There is no reason you can't.

 

If you're only wanting to rev to 6500 and under I'd consider a different cam. A smaller cam will net you better gains and a much better driver.