Author Topic: head casting #'s  (Read 11388 times)

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Offline shawntalaski

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head casting #'s
« on: January 13, 2008, 11:13:36 am »
Are D1AE GA the correct casting #'s for boss 351 heads?

Offline machwun03

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Re: head casting #'s
« Reply #1 on: January 17, 2008, 07:03:31 am »
That what is on my NOS ones

Offline dozz302351

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Re: head casting #'s
« Reply #2 on: January 18, 2008, 04:56:53 pm »
D1ZE-6090-B  correct casting # for the 1971 boss 351. Your head is a 351 hydralic lifter head.  D1AE is the 351 4 barrel casting # not the boss. Thx

Offline trossol

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Re: head casting #'s
« Reply #3 on: January 18, 2008, 08:17:32 pm »
D1ZE-6090-B  correct casting # for the 1971 boss 351. Your head is a 351 hydralic lifter head.  D1AE is the 351 4 barrel casting # not the boss. Thx

This is wrong.  The correct casting number is D1AE-GA.  That is what is on my original heads.  The only difference between "regular" 351C heads and Boss 351 heads is that the Boss 351 heads were machined for push rod guide plates and valve spring seats/cups.  And, they would need to have the correct date codes.

You can find Boss 351 casting/part numbers here:

http://www.boss351registry.com/Boss%20351%20Part_No.htm

Not all of the part numbers are 100% accurate, but it is pretty good.  They show that the engineering number (that's what would have been on the box) is D1ZZ-6049-B, but I can't confirm that.

Tim

Offline coupe3w

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Re: head casting #'s
« Reply #4 on: January 21, 2008, 01:25:53 pm »
 I bought new Boss 351 heads back in '74. The part # is D1ZZ-6049-B and get this I paid $61.10 for one head and $60.00 for the other. These were bare heads, such a deal.

Offline 1971rcode

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Re: head casting #'s
« Reply #5 on: January 22, 2008, 12:53:28 pm »
the D1ZZ B is the correct part number for the boss 351 head. But the D1ZE B casting number is for the boss 302 replacement heads ,dont let the casting number and the parts numbers confuse you. yes alot of the times the casting number and the parts numbers coinside with each other BUT NOT all the time remember ford was going to build the boss 302 into the 71 model year. most of the books have the D1ZE B head listed as a Boss 351 which is wrong. either out of confusion with the actaul part number , or because they didnt build any boss 302 for sale to the public. Of all the true Boss 351 heads i have seen ,  have all been D1AE GA ,I have not my any means seen them all , but i have seen probably 25 set , yes a small percentage, but still a fair amount.I would say if there was any other casting number for the boss 351 heads i would say it would be the D0AE N . but you must remember that Ford listed the combustion chamber space for the Boss 351 as 67cc, which is what the D1AE GA heads had , and the D0AE N heads as 63 cc , just food for thought.

Offline djjsc

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BOSS351 head casting #'s
« Reply #6 on: April 02, 2018, 10:45:52 am »
The 1972 OHO manual lists both the '71 M & '71 R heads having 66.1cc chambers & are the only heads spec'd @ 66.1cc.   That would account for the M-code compression difference 'tween '70 (62.8cc, 11:1) & '71 (10.7:1).  Using same head w/ pop-up pistons gave 11.3:1 on the '71 BOSS.

Offline gsneed

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Re: head casting #'s
« Reply #7 on: April 06, 2018, 07:59:52 pm »
I ran into this frequently when I began restoring my Boss in 1987. Part numbers listed in Ford books often don't match casting numbers. Most Boss part numbers are D1ZZ, most casting numbers reflect what Cleveland pieces were on the shelf at the time and could be adapted to Boss specs. Dash L blocks, machined heads and exhaust manifolds, etc. You just have to do your homework.

Offline boss1ncj

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Re: head casting #'s
« Reply #8 on: April 08, 2018, 03:21:29 pm »
This confusion with the 'part numbers' has existed for decades.  You can google search for more detailed explanations, but in general the part numbers (cast, ink stamped, paper tags) on the part are generally Engineering numbers, while the Service part number will be on the box/bag that was sold over the counter.  They are related but not the same alphanumeric.