RARE ALUM HEAD

69motion · #1 10-04-2007, 06:33 PM

i have a O experimental alum head dated feb 1965 does anyone have mate or know what it would have been used for chaparelle? thanks jeff

**markjohnson** · #2 10-04-2007, 06:40 PM

Wow, that is early. Pretty much right at the debut of the modern Mark IV big block. I would have to say though that your guess of Chaparelle usage to probably be correct. That team had some very special equipment from GM that the public could not acquire. Love to see some pics.

**PeteLeathersac** · #3 10-04-2007, 08:33 PM

Eary is right and Type 'O' castings...C

L!.

I could be wrong but don't believe Jim Hall or even McLaren were running MK1V's until the '67 cars?.

I'd be leaning more towards a Corvette application, maybe some Mickey Thompson road racer...actually when did they start building the '66 L88's?. Yes the '66 L88 not '67...a select few got them, our hero Yenko for one also Penske..

There was a bunch of aluminum engine action going on at GM around that era w/ the CERV cars etc and although I don't think they ever did it, wasn't there some plan for putting a MK1V into the XP819 rear engine 'Vette?. Even the original SB was all aluminum...and necessary w/ that rear overhang!.

A set would go nice on a Z16!.

~ Pete

**iluv69s** · #4 10-28-2007, 01:26 AM

I assume its a Big Block head when you mention Chaparrall?? Cause I have a pair of O-dash sm. block heads..I think they are dated 63 though...How 'bout a pic.??? I dig O-dash parts...too cool!!

**Paul_S** · #5 10-28-2007, 07:53 AM

Would love to see pics of both the Big Block and Small Block 0- heads...

Do you know any history on your small block heads?

**iluv69s** · #6 10-29-2007, 12:56 AM

At the moment my heads are at Jerry M's aluminum repair guy..The one head had a prior repair that was really ugly...the only thing I know about them is that there was a pic. of a motor years ago on the cover of Hot Rod I believe with these head...they were for nascar i believe...a precurser to the fuelie...One real interesting thing about them is that the exhaust manifold bolt holes in the heads are at 45 degrees to each exhaust port centerline..they dont line up straight across..Someone would have to make custom flanges for headaers to work...When I get them back I'll post a pic....that remins me...its been a while...I'll have to give Jerry a call...

does anyone have that magazine??

**iluv69s** · #7 10-31-2007, 11:09 PM

Sorry to hi-Jack this thread, but the same o-dash prototype heads that I own are on the cover of the 1979 Hot Rod magazine on a motor that they built...it doesn't mention or show much...just that they were made for the '63-64 Trans Am Racing'...did they have Trans Am racing in 63?? They must be for nascar I would think?? Or were thet using all Big Blocks?? Anyway, the article does mention the 45 degree bolt pattern on the exhaust ports, the 8-bolt cast aluminum valve covers...and a few other differences from original steel heads.. anybody ever see these heads before?? I have seen a 59 dated pair of aluminum heads..but would like to know the history on these...I did call Jerry M. to check on the repair work he is doing on my heads, but he is aparently at the SEMA show...I will post pics of the heads when I get them back from him... anyone have a copy???

i tried to post a copy...butttt????

**iluv69s** · #8 10-31-2007, 11:14 PM

allssooo....does anyone have a pair of original GM aluminum small block 8-bolt pattern valve covers that they could never figure what they fit??? I guess I will be making an adapter!!! Thanks again!!!

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