Ford Racing Boss 351 vs... - Vintage Mustang Forums

 
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post #1 of 7 (permalink) Old 09-17-2012, 09:37 PM Thread Starter
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Ford Racing Boss 351 vs...

Does anyone have an idea of what distinguishes the Ford Racing Boss 351 (windsor) block from just a normal 351 windsor? I've seen the FR Boss's be stroked to 427 cubic inches. Can a normal 351w from like a 80s Bronco be stroked to a 427 safely? I'm not sure if they added 4 bolt mains or more webbing or what.
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post #2 of 7 (permalink) Old 09-17-2012, 09:41 PM
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? I've seen the FR Boss's be stroked to 427 cubic inches. Can a normal 351w from like a 80s Bronco be stroked to a 427 safely? I'm not sure if they added 4 bolt mains or more webbing or what.
Yes they can although a 4 inch stroke 408 is easier on the block.


68 J code sprint, 408W
11.47@123.35mph in street trim.
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post #3 of 7 (permalink) Old 09-17-2012, 09:42 PM
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i have 2 of the newer ford boss 351 windsor racing blocks. they are no where near a standard winsdor block. 351w boss block > splayed 4 bolt main caps on 2,3,4. cleveland size main journals. screw in freeze and core plugs. high nickle content. high lifter bores for tiebar lifters and standart base circle roller cam. oils both lifter banks from the front at the same time. its a super strong block.

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post #4 of 7 (permalink) Old 09-18-2012, 09:39 PM Thread Starter
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I appreciate the responses guys. This stuff is so interesting to learn about. I know this is bordering on the tired question "how much horsepower..." But do you think that a FR Boss block would be overkill for a 450 - 500 HP application? Seems to me unless your pushed a lot ponies at high revs a normal 351w block is sufficient.
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post #5 of 7 (permalink) Old 09-19-2012, 01:05 AM
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..." But do you think that a FR Boss block would be overkill for a 450 - 500 HP application?
not at all. i decided to buy one for my 68 torino and its a low hp cruiser. one neat thing is i already have a great block(and rotating assembly) to build on if i decide to go radical. i can change heads and cam and have an instant 200 hp increase.

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post #6 of 7 (permalink) Old 09-19-2012, 04:11 PM
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The best part about these engines is how many modifications there are out there for them. You can build anything you like.

"Speed costs money, son. How fast do you want to go?"
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post #7 of 7 (permalink) Old 09-21-2012, 01:52 PM Thread Starter
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Thanks for the replies guys.
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