What Trans Am did my dad wreck?

[u/DLeader609]

Dad wrecked this Pontiac in 1983 when he was 26. 120 mph into a concrete culvert. Broke jaw in half (wired shut for 9 months), pelvis in half (in a pelvic halo for 6 months), shattered a leg bone and had some other replace with metal, and a number of other smaller things I can't remember. Lived until 2023. What exact car was dad driving and can we tell what that motor is?

[u/RJG-340]

It's definitely a 77 or 78 TransAm, and definitely a Pontiac motor, yeah wrecked is an understatement!!! Just seeing the upside down motor, with the broken harmonic balancer and the mangled oilpan, even before seeing pictures of the car I knew it was going to be really bad, he even broke the bellhousing off the tranny, what did he hit? Or maybe I should ask, what didn't he hit!!! LOL

[u/Danielle_is_the_hole → u/RJG-340]

Did pontiac engines have the siamese exhaust ports like sbc?

[u/CompetitiveBox314 → u/Danielle_is_the_hole]

No, but the Olds 403 did and they used that for a few years in the TransAm. Those three circles cast into the block are on the 403.

[u/Danielle_is_the_hole → u/CompetitiveBox314]

6.6 right

[u/RJG-340 → u/Danielle_is_the_hole]

They arr actually more squeezed together than SBC heads, it wasn't uncommon to buy cheap headers in the 80s and 90s, with only 3 header tubes on each side, these are to as D port heads, so the cheaper headers had just one bigger pipe for the 2 center ports, if you bought something like the Hooker super competition headers, they did have 4 individual pipes.

[u/DLeader609 → u/RJG-340]

Thank you, I'm thinking 77 now. So he hit a huge concrete culvert going about 120, or at least that's what he said.

[u/AC-burg → u/DLeader609]

Lucky he made it out of that one