Stroke or no stroker 331 block available -

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Stroke or no stroker 331 block available

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Old 10-27-2013, 11:27 AM   #1
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Default Stroke or no stroker 331 block available


I have a 331 block available to me for 1k and I was going to put all my parts sitting on my 302 and just move them over. It's a scat block with Keith black flt top pistons balanced with an aluminum flywheel. I have edelbrock performer heads, x cam, trick flow street burner intake, long tubes, that will all move over as far as I am aware.

My concern us the T5 and rear gears. The trans is stock but I have been warned a stock t5 won't hold up. Is that true? What kind of clutch should I be looking at??

Also, I have 373 trac loc gears in the car. Do I need to check the number of splines. Not sure what's in there.

Finally, I need som guesses on what I am upping the horse to. I have 310 to the wheels. What am I hopping up to here? Any other concerns that I should have?

Thanks everyone.
1990 7-up 5-Speed - 331 Stroker, Eibach Pro kit, tubalar control arms front and rear, full sub-frame connectors, 185cc heads, TF Street Burner, X Cam, 3.73 gears, pro comp ignition, etc. etc. etc.
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Old 10-27-2013, 11:45 AM   #2
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The T5 is fine. If you plan on doing a ton of drag racing then upgrade to the aftermarket clutch of your choice? As far as horsepower you wont make a lot more power than your already making with the 331 vs. 302.
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Old 10-27-2013, 05:59 PM   #3
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There will be a small difference in power between the two motors. The T5 will be fine, its clutch dumps and power shifting they dont get along with
1995 Mustang GT
1999 F150 Lariat 4x4

Soon to come: 393 stroker
351w bored .030, Probe Industries forged internals, Trickflow 205's, FTI custom cam, Trickflow R 90mm intake, Accufab 90mm TB, FRPP 42lb injectors, 1 3/4" custom Accufab LT's, 3" exhaust, MS2
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Old 10-27-2013, 09:32 PM   #4
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331 versus 302, 30 cubic inch difference, so about 30 hp and 40 ft lb torque (longer stroke equals more torque). I like how Duncan put the T5, avoid power shifts and you'll probably be okay.
89 Coupe, 369 big bore, AFR, custom Comp cam, Kooks, 3" exhaust, 11.6 @ 121 mph
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Old 10-28-2013, 02:41 AM   #5
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A Scat block?
Please school me on this as I've been messing with small block Fords for years and I've never heard of this one.
As a fact, Scat is a company that supply's many stroker cranks, rods etc. to the aftermarket........
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Old 10-28-2013, 08:53 AM   #6
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And as for the gears and axles, what are your intentions with the car, street, strip? If your planning on racing at the track with sticky tires, upgrading axles and carrier are recommended if they haven't been already. Street car with street tires, you'll be fine with the stock 28 spline axles.
306 with all bolt ons, yada yada yada, letter cam, ported E7's, T5 swap, full exhaust, 3:55's, 2" drop, and the worst paint you'll ever see or feel.
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