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Old 02-09-2012, 08:27 PM   #1
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stroke 331?

What all do I need to stroke my 91 gt to a 331?
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Old 02-09-2012, 09:24 PM   #2
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Originally Posted by 91foxgt
What all do I need to stroke my 91 gt to a 331?
Of your planning on 500hp + you'll need a new block, but if your keeping your stock block , you need to send it out to a shop have it bored out!!

---------- Post added at 10:24 PM ---------- Previous post was at 10:22 PM ----------

Is your 91 GT stock?
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Old 02-09-2012, 11:44 PM   #3
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Re: stroke 331?

Ford Stroker Dimensions
289-302 based strokers (4.030" bore - 0.030" over stock)
Displacement ------ 289 --------- 302 -------- 315 --------- 331 -------- 347 -------- 355
Rod Length ------- 5.155" ----- 5.090" ----- 5.205" ----- 5.400" ----- 5.400" ----- 5.205"
Stroke ------------ 2.870" ------ 3.000" ----- 3.076" ----- 3.250" ----- 3.400" ---- 3.500"
Rod Ratio ------- 1.796:1 ----- 1.696:1 ---- 1.692:1 ----- 1.662:1 ---- 1.588:1 --- 1.487:1

You will need a stroker kit with: .030 over pistons, 5.4" rods & a 3.250" stroked crankshaft.
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