Hitman's Pontiac Trans Am Forum

Trans Am Information => Trans Am Information => Topic started by: 4SPEED on October 18, 2009, 05:16:14 AM

Title: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: 4SPEED on October 18, 2009, 05:16:14 AM

1977 W72 Pontiac 400: Y6, YG (automatic) WA (manual)  block code

what's the difference between the Y6, YG block?   is one early 77 and other late 77?

(http://www.78ta.com/gallery2/main.php/d/21582-1/77+W72+015.JPG)
(http://www.78ta.com/gallery2/main.php/d/21584-1/77+W72+016.JPG)

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: RENOVATIONS on October 18, 2009, 11:03:58 AM

Y6 is the W72 400 (auto) for '77...I'm not aware of a YG in '77.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: 4SPEED on October 18, 2009, 02:18:08 PM

1977 L78 Pontiac 400: XA
W72 Pontiac 400: Y6, YG (automatic) WA (manual)
Olds 403: VA, VB, U2, U3

http://www.78ta.com/enginecodes.php

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: fb_rider on October 18, 2009, 03:29:16 PM

I don't think there's a YG.  I think that it's just easy to mistake the Y6 for YG, so in some places (I think on this site as well), it's listed as Y6 and YG.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: 4SPEED on October 18, 2009, 04:07:44 PM

ok ya, I could see were the 6 could look like a (G)  thanks.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: y88rick on October 18, 2009, 04:17:18 PM

i need the Y6 block for my 77

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: 4SPEED on October 18, 2009, 04:48:34 PM

rick I have both.  Y6 and WA motors.  tha auto is #'s to it's car. but will sell the WA block

(http://www.78ta.com/gallery2/main.php/d/20539-1/show+011.JPG)

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: y88rick on October 18, 2009, 05:20:46 PM

right
 i'd love to have a w72 motor but if im going to go through the hassle, i'd like to get a y6 and i wouldnt need heads either as i still have those just no longer have the correct y6 block and even if it isnt #'s for my car, atleast it would be a correct style block.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: 4SPEED on October 18, 2009, 05:45:29 PM

sure I would want the Y6 to. I will keep my eye open for another.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: y88rick on October 18, 2009, 05:46:09 PM

appreciate it buddy.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: Hitman on October 18, 2009, 10:08:22 PM

Quote from: fb_rider on October 18, 2009, 03:29:16 PM

I don't think there's a YG.  I think that it's just easy to mistake the Y6 for YG, so in some places (I think on this site as well), it's listed as Y6 and YG.

The YG engine is listed in the GM parts catalog for the engines and original GM liturature, so it is not a typo or a mistake.

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: 4SPEED on October 18, 2009, 10:20:17 PM

thanks Brett. I nu you put it there for a reason

Title: Re: 1977 W72 Pontiac 400: Y6, YG block code?
Post by: Maxthe222 on August 24, 2017, 03:30:36 AM

Bit of a strech but that Y6/YG block if you've still got for sale, what was the partial VIN on that one? Been trying to track down an old engine for a SE T/A