I am looking for info and a market value for a 67 Firebird that my wife inherited. It, as far as I know, is a factory model 400 with a relatively recent (+/- 5 years ago) rebuilt 455 under the hood. How can I confirm if it is a true 400 or a fake? I have pics but don't see any option to upload them.

This is definitely more of a go car than a show car, headers, high rise manifold (hood is raised in the back for clearance), rear end locker.

Under the hood is a 8 out of 10.
Interior is a 4.
Body gets a 6-7.

If it is a 400, is it still worth more than a base model with the mods?

TIA

I figured out how to display some pics

Obviously, any 400 1st gen will be worth more with all it's original parts. If you don't have the originals, the next most desirable thing is to get replacement parts with the correct casting numbers & date codes.

But, if the numbers don't match, a 455 will be worth just as much as a 400--more in some cases. For example: a later model 400 with a 500557 block will be worth much less than a 455, to most informed Pontiac guys.

And, a base model '67, which doesn't have it's original engine will be worth more with either a 400 or 455. IMO

But, there are a few purists out there, I suppose, who would prefer to have an OHC six, or 326HO, even if they were not original. Tastes differ.

"...If it is a 400, is it still worth more than a base model with the mods?..."

Yes ! Because it looks clean enuff to restore with the numbers correct parts. Done correctly, it would probably bring $25k-$35k.

As is, I'd guess $12k-$15k. Looks to me like it would be a bargain at $10k. If I had plenty, I'd go $10k on it myself.

"...How can I confirm if it is a true 400 or a fake?..."

You can get a PHS report on it.

http://www.phs-online.com/

Actually, just for '67's, you can confirm a factory 400 model straight off the body tag on the firewall between the brake master cylinder and the wiper motor.

It should have a code "3F" under options. But the full PHS documents are of course better to have.

I will warn you though - you are missing a couple of the factory telltales for a 400 model from the front end. And your original center console, if the car had one - would have been a matching red.

Thanks for the replys. I've been googling a bit and found Hargarty's price guide and only find the 400 ram air, which I thought was different from just a 400?

https://www.hagerty.com/apps/valuationtools/1967-Pontiac-Firebird-400

Does Hargarty's pricing apply onlyto matching #s cars? cause even in fair condition it's saying 30k?

And I got under the hood and got this pic of the body tag, so it appears to be a true 400.

"...Does Hargarty's pricing apply onlyto matching #s cars? cause even in fair condition it's saying 30k?..."

Yeah, if you wanna get anywhere near $30k, you'll need to get some numbers matching parts and make a lot of other improvements. $30k cars are mostly for collectors & show people. And they won't give that kind of price for a pieced together car. A high power 455 don't impress them at all. To them it's just the wrong engine, that will deduct points, and value.

This car appears to be in plenty good enuff shape for a nice complete resto, with all the correct number parts you can find. If you're not gonna do it, it would be nice to sell it to someone who will. But, as I've read on the forums many times, "It's yours. Do what you want with it."

Yeah, Hargarty's seemed high, but they only list a 400 Ram Air, which I found out is a much more rare animal (only 65 made vs. about 18.5k 400s). It's odd that they don't list a non ram air 400.

This one is going on the auction block shortly. Not really my style (my current DD is a Miata). If it had a manual I might have tried to talk the wife into keeping it.

I'll post here when I put it up on eBay.