ok pintoches (you may rember him) needs some information on a set of heads on a 351C. the guy selling them (they come on a 351c) claims they are one of the few boss heads made for the cleveland. when ches looked for a casting # he came up with this
3G30
but he was looking at it at quite an angle and he has been know to mix up letters and numbers... i cant find ANY casting number such as this in any of my books on ford motors (all of which are borrowed from ches) i did come across in my searches for a casting # some d1ze d2ze and d3ze codes for the boss 351C heads... numberdummy you might have somthing special to say about this

 

Allen - you might also ask in the 335 forum, there are some pretty good engine guys in
there sometimes.

 

3G30 is July 30, 1973. With this casting date, these could be D3ZZ6049A = 1973/74 351C 4V.

I just found one a these heads at a dealer a coupla days ago. P/M me for the info. I'm not typing it here, cuz someone could beat you to it.

I'll look and see what those casting numbers are you posted...if I can find them, since you left out the suffixes.

I can tell you right know, I do not have casting info after 1971.

BOSS 351C head Ford part numbers: 1971 = D1ZZ6049B // 1972 = D2ZZ6049A

 

Boss 351 was 1971 only, no Boss in 73 what so ever. There was a 351CJ in 73 but you would be better off getting a plain jane set of quench 4V heads and just having them machined for studs and guide plates. These head will most likely bring a premium if they are CJ heads for collector reasons. Just FYI don't really know your plans but for the vast majority of street 351C these heads are kind of the worst of both worlds, giant 4V ports and the same open chambers as the 2V heads.
-Johnboy

 

Since the 1965/72 Ford Passenger Car Parts Catalog lists Boss 351 heads for 1971 (D1ZZ6049B) and 1972 (D2ZZ6049A), why would be a listing for 1972 if there wasn't any such thing?

I was never "into" the Hi-Po stuff back then, so I cannot remember all the particulars.

 

Could have been service replacement (you would probably be able to tell by the number?) or I could be wrong, but I was pretty sure that BOSS 351 replaced the BOSS 302 as the factory trans am car and ford pulled the plug on factory racing programs for 72. The BOSS 351 became the 351HO in 72 and then in 73 it became the CJ. According to the BOSS 351 registry they pulled the plug on the BOSS September 14, 1971 and made less than 2000.
-Johnboy

 

From the same parts catalog: D1ZZ6049C .. 351CJ Cylinder Head

Application: 1971/72.

btw: If the heads were service part replacements, the parts catalog and/or the O-S-I (Obsolete-Supercede-Interchange) Catalogs would say that.

I see nothing.

 

Sorry looks like I was wrong but the 73 heads are all open chambered right? Don't want to spread miss info.
-Johnboy

 

i thought about it but i know you guys alot better and we get more traffic here than they do. i figured i'd try it here and move there if i needed more info.

here's what ches told me about the motor, he said its ready for a titanium sleeve job and could safely turn 10,000 RPMs. they were built by ford for the stock car races, and in order to be elligible for the races there had to be a minimum of 2000(or somthin like that) in production, so ford threw out about 2000 of these 'pavement pounding mother......s' in some cars and this is one of them. he told me alot more about the motor but its 1:30 and i cant rember when i work tommrow... oh wait, i open........... good nyte guys!

 

Quote:

Originally Posted by hittman1422

they were built by ford for the stock car races, and in order to be elligible for the races there had to be a minimum of 2000(or somthin like that) in production, so ford threw out about 2000 of these 'pavement pounding mother......s' in some cars and this is one of them.

I have a book around here somewhere that explains a lot of that stuff, my dad
had a 1969 Boss 302 (it's the other car I learned to drive a stick shift in as a
kid) and I remember reading about the Trans-Am cars of that era - Mustang,
Camaro, Pontiac GTO, possibly the Dodge Charger, things of that nature. And,
I remember about there needing to be a certain number of those cars in
production in order to qualify. I don't remember hardly any of the specifics,
though, especially concerning 1971+ models. fordmuscle.com might have some
info but you might need a subscription to access that info.

 

I have looked every mustang book I have and searched the internet and BOSS 351 is 1971 only. The BOSS was the R code and in 1972 the R was transferred to the 351HO, and went to open chambered heads. The 351CJ was 71-73 as the Q code and went to open chambers in 72 like all the 4V 351Cs did. I do not know what is up with there being a part for a 1972 BOSS 351 but the car does not exist. The BOSS 351 was the lowest production of all the BOSSes with only 1806 made.
-Johnboy

 

As I stated before, I was never into this Hi-Po stuff originally, have never owned a Mustang, because I'm oversized, so I can't fit in any of them, then..or now.

I do however, have lots of Ford reference material.

1971 Boss 351 production = 1800.

1972 Boss 351 production = 0.

You are correct, 1971 only. Why Ford lists a 1972 head part number, I dunno.

 

found in one of my motor books today the number of motors required to be elligble for stock car racing, 500 LOL they made about that many of the 428(or was it the 427? or the 429? i think it was the 428...) SOHC 8v motor... packed a amazing 600+ hp at about 7k, and 500+ lbs of torue at only 3700... if could drop that into my little stepside, wow...