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Forum: Pontiac - Street 09-21-2021, 09:01 PM
Replies: 25
Views: 3,163
Posted By drewm
Thats a good question. I dont know. I think I...

Thats a good question. I dont know. I think I would look for either a standard bore 400 or 455 and base my decision off which block I end up with.
Forum: Pontiac - Street 09-21-2021, 04:32 PM
Replies: 25
Views: 3,163
Posted By drewm
Ugh, this decision is killing me. If it were the...

Ugh, this decision is killing me. If it were the original motor, it would be a no-brainer. Part of the issue is this car is me reliving my youth and thinking that I want to do to this GTO what I...
Forum: Pontiac - Street 09-20-2021, 07:26 AM
Replies: 25
Views: 3,163
Posted By drewm
It did have a full length windage tray, removed...

It did have a full length windage tray, removed for pictures.

I do think that I am going to sell this one. Maybe find someone with a B body looking for a correct stamping. I know with a stroker...
Forum: Pontiac - Street 09-19-2021, 09:09 PM
Replies: 25
Views: 3,163
Posted By drewm
Stamping on motor and crank

Stamping on motor and crank
Forum: Pontiac - Street 09-19-2021, 09:07 PM
Replies: 25
Views: 3,163
Posted By drewm
So the plot thickens on this motor. The heads...

So the plot thickens on this motor. The heads are 76, casting date of April of 65. The block is a 389 with a casting date of K55, which if they skip the letter "I", that is October. I would think...
Forum: Pontiac - Street 09-19-2021, 08:46 PM
Replies: 25
Views: 3,163
Posted By drewm
My mistake, typo, I meant X4. A 1973 400 2...

My mistake, typo, I meant X4. A 1973 400 2 barrel catalina.
Forum: Pontiac - Street 09-13-2021, 07:27 PM
Replies: 25
Views: 3,163
Posted By drewm
I did not know that about 4X blocks. Good info...

I did not know that about 4X blocks. Good info to know, and might explain why it is barely running.
Forum: Pontiac - Street 09-13-2021, 06:07 PM
Replies: 25
Views: 3,163
Posted By drewm
Thanks again for your thoughts guys. I still am...

Thanks again for your thoughts guys. I still am on the fence about keeping this motor. Regardless, I am going to rebuild whatever motor I put back in the car, so I am not sure I want to put the...
Forum: Pontiac - Street 09-13-2021, 04:36 PM
Replies: 25
Views: 3,163
Posted By drewm
Thanks guys, its not in the car, and the car is...

Thanks guys, its not in the car, and the car is in the beginning stages of resto. Unfortunately, I have no history of the car, and when I bought it, it was in pieces. Im really not sure if I am...
Forum: Pontiac - Street 09-13-2021, 03:03 PM
Replies: 25
Views: 3,163
Posted By drewm
What do these cylinders tell you about this motor?

I decided to get a bore scope camera to look at the cylinders of the motor that came with my car. Its a 66 YF 389, but I believe has been rebuilt at some point in the past. To what extent, I do not...
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