| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
05-22-2023, 04:02 PM
|
|||
|
|||
455 identification.?
Can anyone I’d this 455 ?
Thank you |
|
#2
05-22-2023, 04:44 PM
|
||||
|
||||
|
A 455 with a YH code could be a 1970 360 hp 4 bolt main engine, or a 1972 200 hp 2 bolt main engine .
All 455s but for the last one in 76 where at least drilled and taped for 4 bolt mains even if they only had 2 bolt caps. A YH code could also be 2 bolt main 1969 428 motor . A 428 crank on the flywheel flange will have a good bit of a hook shape on one side of it, a 455 will not. The block casting number above the oil filter pad of a 70 motor will be 9799140, and 72 will be 485428.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 05-22-2023 at 04:54 PM. |
|
#3
05-22-2023, 04:50 PM
|
||||
|
||||
|
YH B-body 1970 455 360hp Turbo 400 4.barrel carb, block cast-# 9799140, 2-bolt main caps.
or YH B-body 1972 455 200hp Turbo 400 2-barrel carb, block cast-# 45428, 2-bolt main caps. |
| The Following User Says Thank You to Kenth For This Useful Post: | ||
|
#4
05-22-2023, 05:46 PM
|
||||
|
||||
|
It would be a '70.
__________________
So long, farewell. |
|
#5
05-23-2023, 04:06 AM
|
||||
|
||||
|
1972 casting # would be 485428.
|
|
#6
05-23-2023, 06:09 AM
|
||||
|
||||
|
The best and easiest way is find the partial VIN on the block. (if 1970/72)
With the non-chipped zero in the EUN, I'd say it is a 1970 like HFR said. 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
| The Following User Says Thank You to johnta1 For This Useful Post: | ||
|
#7
05-24-2023, 02:59 PM
|
|||
|
|||
|
Thank you.
As always, thank you for replying.
|
|
#8
05-24-2023, 04:31 PM
|
|||
|
|||
|
...or you could look at the casting date by the distributor hole...
Dennis |
|
#9
05-24-2023, 04:55 PM
|
||||
|
||||
|
What does this # indicate?
__________________
Esquire '74 T/A 455 Y-code SD clone previously on Dawson's Creek: '74 T/A 400 '81 AMC SX/4 '69 FB 350 |
| The Following User Says Thank You to kingbuzzo For This Useful Post: | ||
|
#10
05-24-2023, 05:31 PM
|
|||
|
|||
|
Quote:
70 B series engine originally installed in Kansas City (X) B series assembly plant.
__________________
Buzzards gotta eat... same as worms. |
| The Following User Says Thank You to 'ol Pinion head For This Useful Post: | ||
|
#11
05-24-2023, 05:40 PM
|
||||
|
||||
|
Like B Series as in giant boat or land yacht?
Would it be a 4 bolt main if its a B series or just depends? Thanks!
__________________
Esquire '74 T/A 455 Y-code SD clone previously on Dawson's Creek: '74 T/A 400 '81 AMC SX/4 '69 FB 350 |
|
#12
05-24-2023, 05:59 PM
|
|||
|
|||
|
If you're speaking of a '70 YH model production 455 block, it's big car only.
https://forums.maxperformanceinc.com...55#post5568563
__________________
Buzzards gotta eat... same as worms. |
|
#13
05-24-2023, 06:32 PM
|
||||
|
||||
|
Yes the YH code for 1970 would have 4 bolt main caps.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#14
05-24-2023, 07:14 PM
|
|||
|
|||
|
Quote:
Have had hands on a BUNCH of '70 YH code 455's. Another above piece of misinformation to dispell : "All 455's but the last one in '76 where at least drilled & tapped even if they only had two bolt caps". Have posted before of an A082 cast '72 455 block that I pulled in the late 90's. Was not machined for outer (4) bolt holes. A little while later I was at Len Williams shop in Tulsa & he had, awaiting to be machined, another '72 455 block dated A082, that was not drilled & tapped for the outer bolt holes!!! Have to say, the first early 70's 455 blocks that I had run across that were not drilled & tapped for 4 bolt mains. Have to keep in mind, at that time, I was pulling a lot of Pontiac 400 & 455 blocks (Len was getting a good chunk of the generic coded 400 blocks & every thing else went to my retail stock). In the the late 00's, I was @ PY member 63 Longtop's place in Salina KS. Jim had a mid June of '73 cast 455 block that was not drilled & tapped for 4 bolt main caps. I had pulled tons of 73 455's out of Bonnes & GrandVilles but from my logbooks had not pulled one cast & later machined from that time frame Have also pulled numerous '75 production 455 blocks that were not drilled & tapped for 4 bolt caps. By far, I've had less '75 & 76 production Pontiac 455 blocks than other production year blocks. Two of those '75 455 blocks I paid up to have ProgramEngr 4 bolt main caps properly installed.
__________________
Buzzards gotta eat... same as worms. Last edited by 'ol Pinion head; 05-24-2023 at 07:22 PM. |
| The Following 3 Users Say Thank You to 'ol Pinion head For This Useful Post: | ||
|
#15
05-24-2023, 08:38 PM
|
||||
|
||||
|
Quote:
__________________
62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
|
#16
05-25-2023, 06:02 AM
|
||||
|
||||
|
I would agree to never say never also !
We have all seen the results of the assembly line having a motor in a car with a issue after the test stand check out and then to get the car out they they put in what they had in reserve, even if it meant putting a 4 bolt in a car that was sold as a 2 bolt.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#17
05-25-2023, 03:02 PM
|
||||
|
||||
|
That was far from claiming ALL 1970 YH has 4-bolt main caps.
|
|
#18
05-25-2023, 03:47 PM
|
||||
|
||||
|
This what I was going by.
Sorry I believed and passed along what was in print.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
|
#19
05-28-2023, 07:57 PM
|
|||
|
|||
|
I don't think my 1974 YW 455 block was drilled and taped for 4 bolt mains. I will have to check when I am back over my friends house, where we are building my motor.
|
|
#20
05-29-2023, 12:04 PM
|
||||
|
||||
|
If it's a block from a big car, does that lessen it's worth somehow?
Does it have weaker webbing or less nickel than the performance lines or is it the same difference?
__________________
Esquire '74 T/A 455 Y-code SD clone previously on Dawson's Creek: '74 T/A 400 '81 AMC SX/4 '69 FB 350 |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
