69 351w vs 90 351w

Bad92GT

The 5 Minute Plan Man

Jun 10, 2004

492

0

0

SC

Mar 20, 2006

#1

• Mar 20, 2006

• #1

im about to get a motor to pull down and start building it.. i can choose between a 69 4bbl motor.. or a 90 windsor.. difference is i know of ones a roller and ones not.. which block is stronger??? im building a stoker looking for 500+ so it needs to be strong

 

B

Bigstang1

Founding Member

Aug 28, 2002

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Massachusettes

Mar 20, 2006

#2

• Mar 20, 2006

• #2

definatly go with the 69 block. they are both non-roller blocks. the early blocks are highly saught after for their streangth over the later blocks.

 

Vipersix

Founding Member

Feb 25, 2001

434

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Clarksville, TN

Mar 20, 2006

#3

• Mar 20, 2006

• #3

Neither is a roller, go with whichever is of a better condition.

 

pb_paulie_b

Founding Member

May 19, 2001

894

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Chaptico, Maryland

Mar 20, 2006

#4

• Mar 20, 2006

• #4

Are you kidding? 69' block is way stronger and a lilttle rare. Good score! Go with the 69' .

 

Vipersix

Founding Member

Feb 25, 2001

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Clarksville, TN

Mar 20, 2006

#5

• Mar 20, 2006

• #5

How do you figure? There weren't any particular changes in the '69 blocks and refining techniques have improved since then. I figure they're on equal footing.

 

pb_paulie_b

Founding Member

May 19, 2001

894

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Chaptico, Maryland

Mar 20, 2006

#6

• Mar 20, 2006

• #6

Thicker main webbing. You can go 4 bolt main if you want. Higher nickle content....

 

bluevenom867

I will have images of molesting stuffed animals in

Dec 15, 2003

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St.Petersburg,FL

Mar 20, 2006

#7

• Mar 20, 2006

• #7

pb_paulie_b said:

Thicker main webbing. You can go 4 bolt main if you want. Higher nickle content....

Click to expand...

Yup.

:SNSign:

And you can 4 bolt the other 351W blocks,but the 69' has flat main bulkheads,whitch makes it alot easier.

I wonder if there is a differance in cylinder wall thickness?Hmm....

 

Vipersix

Founding Member

Feb 25, 2001

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Clarksville, TN

Mar 21, 2006

#8

• Mar 21, 2006

• #8

Hmm... thought they stopped that in '68. I don't have any of my books with me so that was just off the top of my head. It wouldn't be the first time I was wrong.

 

vristang

15 Year Member

Mar 31, 2005

4,933

101

124

Seattle

Mar 21, 2006

#9

• Mar 21, 2006

• #9

So far as I know, 69 was the first year of the 351w.

 

Rick 91GT

Mustang Master

Nov 29, 1999

9,692

95

99

PA

Mar 21, 2006

#10

• Mar 21, 2006

• #10

The 69-74 blocks all feature thicker mains/walls.

The 69-70 is a 9.48" deck height
71+ is 9.503

Keep that in mind when you look at rotating assemblies, it is very important of the pistons will be sticking out of the bore.

 

Vipersix

Founding Member

Feb 25, 2001

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Clarksville, TN

Mar 22, 2006

#11

• Mar 22, 2006

• #11

Hmm... now that you mention it, I don't know what the heck I was thinking of!

 

8

86bluecobra

Advanced Member

Dec 20, 2004

4,265

12

69

B.C. Canada

Mar 22, 2006

#12

• Mar 22, 2006

• #12

i have a 72 351w block and have had no problems with it. I would say go with the stronger 69 block. Another thing that differ's in the 2 blocks i believe is the 69 is a 2 piece rear main seal and the 90 is a 1 piece. i would also think that the 69 block would be a little heavier.