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Forum: Pontiac - Race 07-13-2007, 02:42 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Skip,your right about it being hard to compare...

Skip,your right about it being hard to compare the various pics,so I will post some old ones here again to show the difference between the thick and the thin.

First two pics were posted a few...
Forum: Pontiac - Race 07-12-2007, 06:34 PM
Replies: 269
Views: 22,219
Posted By screamingchief
This one has dowels,look at the pic full...

This one has dowels,look at the pic full size,they're visible there.

Also the front cap was off before the pics were taken,solid dowels I assure.

Cant say they were all that way,just this one....
Forum: Pontiac - Race 07-12-2007, 03:08 PM
Replies: 269
Views: 22,219
Posted By screamingchief
A few more of the same block. Do note they...

A few more of the same block.

Do note they went back to the '74 #481988 casting (I know it's kinda hard to make out,trust me I looked really close) instead of the #500557 or #568557 casting no.s....
Forum: Pontiac - Race 07-12-2007, 03:05 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Still,this is all good info and exactly what this...

Still,this is all good info and exactly what this place should be about,open exchange of said info.

I've been meaning to dig this thread up too,ran across an interesting block to add,the deep...
Forum: Pontiac - Race 01-22-2007, 12:55 AM
Replies: 269
Views: 22,219
Posted By screamingchief
Probably a good idea Skip,but I do believe a good...

Probably a good idea Skip,but I do believe a good many of the failures come along with the increase in the use of the 3" main 4.21"/4.25" stroker cranks.

My feeling is the added stress of the...
Forum: Pontiac - Race 09-15-2006, 03:54 AM
Replies: 269
Views: 22,219
Posted By screamingchief
That's an interesting one,perchance you might...

That's an interesting one,perchance you might post the casting no. ?

Just curious myself...
Forum: Pontiac - Race 09-14-2006, 09:34 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Your heading in the right direction,but off just...

Your heading in the right direction,but off just a bit in a few areas.

No one thing is the "giveaway",more like combinations of things.

The third valley pic in the above post is a ringer,has...
Forum: Pontiac - Race 09-13-2006, 07:11 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Me no wanna that,no no no,just because I got a...

Me no wanna that,no no no,just because I got a bit of time on my hands now does'nt mean it'll always be that way,hope to get much busier real soon.

Weather is just getting bearable 'round these...
Forum: Pontiac - Race 09-12-2006, 04:44 PM
Replies: 269
Views: 22,219
Posted By screamingchief
See that's my point all along HIS,lets see...

See that's my point all along HIS,lets see it,it's not about the excitement factor,this is all about the mundane factor,the more pics the better,that's all I was trying to say.

I know it can be a...
Forum: Pontiac - Race 09-11-2006, 09:51 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Naw Brian I'm not really worried about that...

Naw Brian I'm not really worried about that "secret" 455 block bit,what I was really getting at here is I just dont want to discourage anybody else from posting their pics for fear some imaginary...
Forum: Pontiac - Race 09-11-2006, 08:31 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Yeah,that's kinda true,I see your point...

Yeah,that's kinda true,I see your point Brian,really I do,but should we,the contributors to this thread,be admonished for trying to correct any possible oversights in that respect?

Granted there's...
Forum: Pontiac - Race 09-11-2006, 03:45 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Please explain to me how this is any different...

Please explain to me how this is any different than any books already on this subject???

Or any books on other pontiac related subjects for that matter???

Are we to admonish Pete McCarthy,Jim...
Forum: Pontiac - Race 09-11-2006, 03:28 PM
Replies: 269
Views: 22,219
Posted By screamingchief
I gotta agree with pablo here,,,HIS,,,if you dont...

I gotta agree with pablo here,,,HIS,,,if you dont have anything to add to this thread beyond derision,please MYOGDB...

Anybody who's been here for any length of time knows your the last person...
Forum: Pontiac - Race 09-09-2006, 11:15 PM
Replies: 269
Views: 22,219
Posted By screamingchief
I did'nt think this thread had anything to do...

I did'nt think this thread had anything to do with 700+ hp block choices,more like those intermediate choices between what is suitable to use for a stock 250-300 HP build,what is suitable for the...
Forum: Pontiac - Race 09-08-2006, 02:32 AM
Replies: 269
Views: 22,219
Posted By screamingchief
Here are the YS block pics: Casting =...

Here are the YS block pics:

Casting = #9799914
Date = ?/??/?
(I forgot to check exact date code when I took pics,had checked it when I got it,I do know it's a '70 motor...)
code = YS...
Forum: Pontiac - Race 09-06-2006, 10:45 PM
Replies: 269
Views: 22,219
Posted By screamingchief
I think as pontiac moved further and further away...

I think as pontiac moved further and further away from selling cars with 4 bolt mains they became less and less likely to drill and tap those outer holes.

Seeing as how that particular 400 block I...
Forum: Pontiac - Race 09-06-2006, 06:18 PM
Replies: 269
Views: 22,219
Posted By screamingchief
Ha ha ha ha,,,yeah worse yet,looked it up,april 9...

Ha ha ha ha,,,yeah worse yet,looked it up,april 9 1973 was a monday,cast during the day shift!!! :doh:

So it's a post weekend "Oh man am I hungover" block,I dunno,ask me that's worse than a "I...
Forum: Pontiac - Race 09-06-2006, 01:51 AM
Replies: 269
Views: 22,219
Posted By screamingchief
Looks like the same basic casting as my bare 455...

Looks like the same basic casting as my bare 455 block, casting #485428,the Pete McCarthy bible says that casting was used '71-'74 in non H-O or S.D. applications.

Also the PM bible says the...
Forum: Pontiac - Race 09-06-2006, 01:22 AM
Replies: 269
Views: 22,219
Posted By screamingchief
I'll get some pics of the YS block up later,the...

I'll get some pics of the YS block up later,the lighting back there is giving me fits and I had to take about 40 pics of each to get usable pics,so the batteries are getting low.

HTH.
Forum: Pontiac - Race 09-06-2006, 01:18 AM
Replies: 269
Views: 22,219
Posted By screamingchief
And for now my spare 455 block,bare w/caps: ...

And for now my spare 455 block,bare w/caps:

casting number= 485428
date code= ?183
code= YU
application= '74 250 hp,A/T,4bbl.
Forum: Pontiac - Race 09-06-2006, 01:07 AM
Replies: 269
Views: 22,219
Posted By screamingchief
Next,spare 400 bare block w/caps:Valley is the...

Next,spare 400 bare block w/caps:Valley is the same as race 400.

casting number= 481988
date code= l053
code= YH
application= '74 190 hp,A/T,2bbl.
Forum: Pontiac - Race 09-06-2006, 01:01 AM
Replies: 269
Views: 22,219
Posted By screamingchief
Well,,,after some frustration with my digicam...

Well,,,after some frustration with my digicam I'll post my pics.

First set is my race cars 400:
casting= 481988
date code= D093
Code= XN
application= '73 230 HP,A/T,4bbl.
Forum: Pontiac - Race 09-05-2006, 03:42 PM
Replies: 269
Views: 22,219
Posted By screamingchief
My '70 YS block looks to be virtually identical...

My '70 YS block looks to be virtually identical to the pics of Jeff Walker's race block.

The bottom end on the '70 YS is still assembled,but that's the spittin' image of the casting it uses,his...
Forum: Pontiac - Race 09-05-2006, 05:10 AM
Replies: 269
Views: 22,219
Posted By screamingchief
I went out and looked at all my blocks,all had...

I went out and looked at all my blocks,all had thicker bulkheads than Skips block,most are early '70's (1-350,3-400's,1-455) blocks,one of them,a '70 YS 400 block was obviously thicker and cast...
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