How many miles is getting to be too much for a blower on stock block?

I hope to be blown this summer and would be around 50K miles give or take 2K miles. Eveything else is stock on the engine.

I plan getting a brand new short block with forged internals in 2007, this somewhat makes the engine new, except for heads, cams, correct?
I may get new heads and cams at the same time of the short block install, does this BASICALLY make dropping in a new engine and it would be close to having 0 miles on the engine??
I know little things are still old, such as alternator, oil pumps, things of this sort.

 

50k is fine. 80 - 90k and you are pushing it, unless you don't care and plan on a new motor and somepoint anyway.

Do a good compression check.

 

your fine thats low miles. I would put boost even on a high milage motor as long as it has good compression and no leaks etc.. its fine. i just wouldnt run 10psi on a 100k plus motor. but regardless you will be A ok.

 

Thanks guys.