1969 Firebird

[COPO_Anders]

Hi ! I visited a friend in Hyltebruk Sweden today and he showed me the Firebird he bought in C.T. earlier this year. The car had a 350 engine from the factory but he is not sure of what´s in it now. Can you tell ?













He is still working on it but expects to be more or less ready later this fall. Here is a before pic.

[Xplantdad]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COPO_Anders</div><div class="ubbcode-body">
Hi ! I visited a friend in Hyltebruk Sweden today and he showed me the Firebird he bought in C.T. earlier this year. The car had a 350 engine from the factory but he is not sure of what´s in it now. Can you tell ?



He is still working on it but expects to be more or less ready later this fall. Here is a before pic.


</div></div>

Try these? From HERE....

Year Engine HP Engine code Trans CR Cam Head Code BBL Carb No. Misc
1966 389 325 HP YW A 10.5 066 092 1-4 4034S Block Casting # 9778789
1968 400 330 HP YW A 10.75 067 16 1-4 7028264 HO Block Casting # 9790071
1969 400 335 HP YW A 10.75 067 62 1-4 7028270/7029270 RA III Block Casting # 9790071/9792506
1972 455 HP YW A 8.2 066 7L4 1-2 7042064 Block Casting # 485428
1973 350 150 HP YW A 8.0 555 46 1-2 7043062/63/72 Block Casting # 488986
1974 455 250 HP YW A 8.0 067 4X 1-4 7044262 Unititized Dist Block Casting # 485428
1975 455 200 HP YW A 7.6 067 51 5I 1-4 7045262 early head Block Casting # 500813
1975 455 200 HP YW A 7.6 067 51 5I 1-4 7045262 early head Block Casting # 500813
1975 455 200 HP YW A 7.6 067 5C 1-4 7045262 Block Casting # 500813
1977 301 135 HP YW A 8.2 868 01 1-2 17057172 Block Casting # 525934
1978 400 180 HP YW A 7.7 471 6X 1-4 17058264 Block Casting # 568557/500557

[njsteve]

The side of the block will have the size on it:




The date code will be on the top at the rear, as well as the casting number:

[njsteve]

The 7H1 cylinder head was used on the 1972 350/160 and 175 horsepower 2bbl engine. Valves are 1.96/1.66 resulting in 7.6 to 1 compression ratio.
The &quot;YW&quot; stamping looks kind of weird like there is something stamped under the &quot;W&quot;.

Verify the numbers/dates in my above photos and post them. We can then tell you what it is/was.

You never go by just the cylinder heads since Pontiac fans tend to swap heads to make different compression ratio combinations (like what we are doing with Gramma's car - adding the 96 CC 1975 6X-4 heads from the ultra low 7 to 1 compression 1975 350 to a 455 block will give you a 9.5 to 1 ratio 455.

[GTO_DON]

That is most likely a 72 YR BLOCK with the original heads that somebody tried to bluff as an original 69 firebird ram air engine. Somebody definitely restamped that W for sure. On a good note it's an original Matador Red car with black roof.

[COPO_Anders]

Thanks guys, I´m waiting for my friend to find the numbers on the block so that we can verify what he has.
He´s building it the way he wants it, like if he had been sitting with the salesman ordering it new. He will probably put a red interior in it.
I´ll get back as soon as I get the numbers.

[img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

[StealthBird]

Don, looking at that engine stamp, it doesn't appear to have been &quot;YR&quot;, but perhaps a &quot;YP&quot;? I don't see the stem of the &quot;R&quot; in there. The &quot;W&quot; definitely looks like a restamp.

[GTO_DON]

I thought of that too but I was going with the odds that the block and heads are matching original and there is no yp listed in 72. Either way it's a nothing BLOCK value wise.

[COPO_Anders]

Hi guys !

My friend never came back to me with the numbers, but he wants to thank you for your help. He says that the engine is indeed a 1972 350. Nothing special from the factory, but it seems to pack more horsepower now. Probably a little more compression and a healthier cam.