331 0r 347

84_GT350 · 10-19-2001, 03:51 AM

They both make good arguements. A 347 will make a tad more torque and HP, but theoretically a 331 will live longer if designed and built right thanks to the preferable rod/stroke ratio. For my money it's the 331. Better rod/stroke ratio, no notching the block (not a big deal...but more money nonetheless), and (again, theoretically) better oil control. Plus it just sounds more unique than a 347.

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

So I pushed it up to 110,
That flathead motor was about to give in,
I crossed my fingers and prayed to the lord,
Don't let me down you fuct up ford!"

"5-Oh Ford" by The Reverend Horton Heat

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10-19-2001, 03:51 AM	#10
84_GT350 Registered Member Join Date: Apr 1999 Location: Overland Park, KS, USA Posts: 1,631	They both make good arguements. A 347 will make a tad more torque and HP, but theoretically a 331 will live longer if designed and built right thanks to the preferable rod/stroke ratio. For my money it's the 331. Better rod/stroke ratio, no notching the block (not a big deal...but more money nonetheless), and (again, theoretically) better oil control. Plus it just sounds more unique than a 347. ------------------ 1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s So I pushed it up to 110, That flathead motor was about to give in, I crossed my fingers and prayed to the lord, Don't let me down you fuct up ford!" "5-Oh Ford" by The Reverend Horton Heat