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Message: <blockquote data-quote="ScottyDsntKnow" data-source="post: 1223121" data-attributes="member: 10454">If your stock shortblock is still ok with a compression/leakdown test then I dunno, you could be fine with a blower.  I've seen people boost running on much higher mileage than 130k, I've also seen ppl with motors let go at under 100k NA.  Really depends on the motor and how well it was taken care of.  But seeing as you already have an explorer intake I'd try to find some explorer/gt40 heads as well and swap them with the E7 stuff.  Leave your stock cam in there.  Then a supercharger if your engine passes the compression/leakdown.  You also need to factor in an extra $600 for a dyno tune and I'd also be ready to replace or rebuild the T-5 if it lets go.  They are notoriously week but can be built to take a very good amount of power via an Astro gearset.  Or just swap to a T-56 or you can even put a T-45 or 3650 in nowadays if you want.As far as power limits, a general rule is that the OEM blocks are good from anywhere in the 450-550hp range before they split.  With the GT40 stuff and the stock cam and a S trim you will easily be in the 425+ range.</blockquote>