304 360 intake swap

[Out of my mind CJ5]

Hi i have a 360 with a 2bbl intake im sticking in my jeep and have an old AMC 304 with a 4bbl intake. would they swap over without any problems. they look like they will but i just wanted to check

 

[derf]

Yes. Like the small block Chevy, the AMC engines (AMC 304 /360/401) can share intake manifolds. There is a difference with the earlier generation 290/343/390 AMC engines from the 60's. But your swap between a AMC 304 and 360 should work.

I would recommend against reusing the metal valley pan gasket based on personal experience. Get new gaskets for both manifolds.

 

[Out of my mind CJ5]

alright thanks for your help

 

[kicknjeep]

Hey derf just for curiosity, Why not use the valley pan gasket?.

 

[derf]

Hey derf just for curiosity, Why not use the valley pan gasket?.

A new valley pan gasket is just fine. I have used them on several AMC engines.

I just wouldn't re-use one. New, they're pressed with raised ridges around the port openings to ensure a good seal. When you torque the manifold down, those raised ridges get flattened. If you use them a second time, they have a tendency to leak.

I reused one since I had nothing else available at the time. I had a water leak at the front water passage and an exaust leak at the exhaust crossover in the middle of the head. Both developed within a week. I put on a new valley pan gasket and the leaks were fixed.

 

[Out of my mind CJ5]

so would it also be safe to assume that heads off a 79 360 will work on a 74 AMC 304 ?

 

[IOPort51]

no, it would not. valves have conflict with cylinder wall, the head chamber is bigger than the cylinder.I have heard of guys notching the cylinder / block to clear the valve but it seems like a lot of work for Limited results.

so would it also be safe to assume that heads off a 79 360 will work on a 74 AMC 304 ?

 

[Out of my mind CJ5]

alright thanks just curious