Boss 302 block

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Boss 302 block

Post  bosshoss on July 4th 2013, 7:49 pm

Considering the possibility of upsizing the 289 in my hot rod.

Already have the headers and the bolt on's.

If I buy a new boss 302 block can I bolt my Edelbrock performer RPM's on top?

Ford site says block not good for stock heads?

dkp
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Re: Boss 302 block

Post  Lem Evans on July 4th 2013, 8:00 pm

I can only assume that a head that will except 1/2" head bolts would be the only road block, unless there is an issue with the water passages at the deck.

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Re: Boss 302 block

Post  bosshoss on July 4th 2013, 8:11 pm

thx Lem.
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Re: Boss 302 block

Post  torino501 on July 5th 2013, 10:20 pm

Is it the big bore block? You can with either one but why would ya?

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Re: Boss 302 block

Post  dfree383 on July 6th 2013, 12:11 am

Yes you can pot your heads on it, need to get a set of 351W head bolts or Studs.
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Re: Boss 302 block

Post  Jeff Jackson on August 7th 2013, 8:09 pm

Hey Dean... so what mph did you run in sg the other weekend at the nationals?

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Re: Boss 302 block

Post  rmcomprandy on August 7th 2013, 8:45 pm

bosshoss wrote:Considering the possibility of upsizing the 289 in my hot rod.

Already have the headers and the bolt on's.

If I buy a new boss 302 block can I bolt my Edelbrock performer RPM's on top?

Ford site says block not good for stock heads?

dkp

The reason the block is not for use with stock heads is that the exhaust side of the deck has water cooling holes like a race block and stock heads have a sculpted lower edge, exposing some of those holes. A race head gasket which is straight across the bottom, (with or without matching holes but straight), and a head which matches this is what is needed.
The Edelbrock heads MAY be straight across.
That is why Ford Racing redesigned their X303 and X305 heads; the redesign was the deck lower edge is now straight with no sculpting. Those newer heads even have a different part number.

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Re: Boss 302 block

Post  bosshoss on August 7th 2013, 8:50 pm

Thanks for the info Randy.

Jeff we ran 163-164 at Seattle.

For some reason I believe I am leaving a bit on the table with this combo.'

Havent been on the dyno yet but I expected a little more with the C heads.

Still just running the 1050 carb on top so that may be part of the problem.

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Re: Boss 302 block

Post  Jeff Jackson on August 7th 2013, 9:03 pm

I would say thats slow. I went 163 at pomona in super street trim and bad air.

I see heard went 160 or 162 he must have tuned his car.

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Re: Boss 302 block

Post  AL Q on August 8th 2013, 12:50 am

Dean, it might be a tad slow (so you say) , but its dam consistent
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Re: Boss 302 block

Post  bosshoss on August 8th 2013, 2:53 am

no complaints there Al. Definitely fat and happy.

sixty foots move around some but the top end is very steady.

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Re: Boss 302 block

Post  Jeff Jackson on August 8th 2013, 10:43 pm

Dean, racing next week at seattle?

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Re: Boss 302 block

Post  bosshoss on August 9th 2013, 12:00 am

God willin and the crik don't rise. Smile
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