Still Looking for Big Valve 350 Heads

Yeah, if I were to go the aluminum head route, I would be putting in a 455 since I have a complete motor laying around. This is a low buck effort to improve slightly without going full mental. I've crossed that line many times in the past. I'm getting better at not overdoing it.

 

Yea i was about to say good luck with that part ahaha

 

LMAO, go full mental, I am
I had givin' thought going big block years ago, even got a complete 455 with a rod knock outta a '73 Le Sabre for free. Couldnt bring myself to swapping my 350.

 

My spare 455 is the small-valve I pulled out of my car to install the aluminum-headed motor in. It was fine when I pulled it and stored in my heated/air conditioned garage. I turn it a quarter turn every month or so. The spare one is milder and has the boss drilled in the side for clutch lever and the crank appears to have most of a pilot hole in it. May not be all the way down square. Swapping would be pretty easy, new clutch kit and flywheel, frame pads and headers are the bare minimum. I have a 4-core radiator in storage. I could run the Holley off the 350 to get it going but I'd need a good quadrajet eventually. I have a full new exhaust for the 350 headers that is 2.5" that would work just fine with the 455 as well.

 

Still looking for a set of big valve 350 heads.

I'm slowly getting it there. The motor is almost out. Just need to cut the exhaust and disconnect the z-bar to pull engine and M20 trans together.

 

I'm slowly getting it there. The motor is almost out. Just need to cut the exhaust and disconnect the z-bar to pull engine and M20 trans together.[/QUOTE]

Didn't 71 GS's come stock with M21 trans? My original 71 GS350 and other one I parted out both had M21 trans? Just asking?

 

Didn't 71 GS's come stock with M21 trans? My original 71 GS350 and other one I parted out both had M21 trans? Just asking?[/QUOTE]

Yes, it did. I swapped in an M20 and it helped the 3.08 gears a lot over the M21 but it still needs more so the M23Z is going in its place.

 

id be interested in some that someone already ported....