3sgte isn't an engine you could just "drop" in your st. St's have different mounting locations for the engine so you would have to get motor mounts from a GT or GTS and install them in the right locations for any S series engines to go into a ST. The 4AGE 20v silvertop is your best bet besides a 4AGZE or a 4AGE blacktop.
the 3s that wyte 91 fury gts is talking about has 245hp. There's the 3rd gen 3sgtes which come from ST205s. Look for jdm motor importers. Keep in mind that they won't pass smog.
another thing if ur gonna swap a 3sgte...not only do you have to change the mounts...but you need a new tranny...lol...if you keep ur st tranny u'll blow it...it can't handle the power...I was gonna do a 3sgte swap in my 90 gts, but im sellin her now...would have costs me 4k for the engine with 20k miles on it, tranny, and install
-ash
90 all trac 98k miles... *To be resurrected...* Gives new meaning to "It looks fast"...It IS fast '90 rolla "Lunchbox on wheels" 167k strong!
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