1964 GTO 389 79J Engine & ST300 Transmission
 

1964 325 HP 389 code 79J with matching ST300 2-speed automatic transmission.

Complete with correct Carter AFB carburetor (not pictured), this engine is in need of a rebuild. The block is currently bored +.040” with cast pistons.

I did a quickie poor man’s rebuild on it 25 years ago, replacing the bearings along with the cam and lifters (068 blueprint cam), a new Edelbrock timing set and a Melling M54D 60 psi oil pump. I didn’t properly rebuild the heads only lapped the valves, I reused the pistons and rings from the previous rebuild. It runs fine but it smokes after it warms up. The ST300 works fine, there’s nothing wrong with it.

I removed this from my ‘64 Le Mans convertible to install a 421 HO and TH350 transmission. If I hadn’t come across the 421 I’d be rebuilding this GTO 389 and matching 2-speed. I do hope someone with a ‘64 GTO that’s in need of an original engine can use this.

Local pickup in Canyon Country CA 91387 preferred. I’m not really interested in shipping it, I can load it into your truck with my engine hoist.

$2500 OBO

Please send me a PM if you’re interested, thanks.

More pictures.

And more pictures.

Still available.

For sale.

Would make a great temporary engine for an older Pontiac (one that has same pulleys and bracket locations).
One could swap this into their car and do a proper rebuild on their numbers matching engine, then swap back. It would keep someone's primo Pontiac rolling, while doing a complete engine overhaul!!!

Still looking for a new home.

For your ‘64 GTO restoration or upgrade your ‘64 Le Mans.

Still available.

Very good original chrome 1964 GTO-only 4-barrel air cleaner included at this price.

For sale.

Still waiting for a new owner. :)

Still available.

May ship if you’re willing to pay for an engine cradle and the crating costs as well as arranging the transport.

Still available.

Still available.

For sale.

Still available.

Still looking for a good home.

I’d honestly love to keep it but I’m simply out of room.

Still available.