stroking out a 352 block

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Dec 2, 2014 | 02:58 PM

fluidp

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Tuned

Joined: Feb 2008

Posts: 445

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From: Forest Grove, BC

stroking out a 352 block

Hi. Im currently looking at some options for my 66 f100. It has a 352 and I am wondering about boring the block to 4.050 (standard 390 bore) and installing a Scat rotating assembly. what is the max stroke I can go with?
I don't mind doing a few tricky mods if required.

Thanks

Dec 3, 2014 | 12:06 AM

85e150

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Joined: Apr 2004

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If your block will go .050 over, you can go as far as you like. The Scat folks or Survival will have all the block clearance info.

With a 4.050 bore, you would end up about 438 with a 4.25 stroke, the largest I found in my 30 seconds of checking.

Dec 3, 2014 | 09:55 PM

rockittsled

Elder User

Joined: Jun 2012

Posts: 850

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From: Florida

Do the drill bit test and if it looks good then do a sonic check on the cylinder walls to find out the actual cyl. wall thickness

https://www.ford-trucks.com/forums/6...st-rehash.html

Good Luck ... core shift is a problem and may show up

Dec 5, 2014 | 08:45 PM

PA74F250

Cargo Master

Joined: Jul 2010

Posts: 2,099

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From: York, Pa

I'd be willing to be you can't go that big on a 352 block. I would suggest looking for a 360/390 block that hadn't been bored yet. Besides I think there's some problems with your plans. I'm pretty sure you can't use a a stock 390 piston with a 4.25" crank. I think the pin location is a little different for the stroker combo. I think Survival only offers a 4.080 or 4.090 piston. If I am right which I think I am on the piston choice means you would really have to make your block big.

The last stock 352 block I had was sonic tested and wouldn't do a 4.050 bore.
I did actually order a 445 kit from Survival like 2 months ago and have yet to see a piece of it so I can't give you any insight on that stuff or at least yet.

Dec 14, 2014 | 03:34 PM

1972RedNeck

Logistics Pro

Joined: Feb 2011

Posts: 3,522

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From: Townsend, MT

Quote:

Originally Posted by 85e150six4mtod

If I was going to spend the money, I would get the 4.375" stroke. Why wouldn't one get the biggest? It's not going to cost much, if any, more than stroking it 4.25".

I definitely wouldn't spend the money on a 410, or in my case, 416.