Engine combo

[Yobie]

I have a 340 with a offenhauser port o Sonic single plane intake. This motor was supposedly built but it has 318 heads which confuses me.

Unless there is something I don't know why would someone use cast number 2843675 (1.78 intake/ 1.5 exhaust) heads on a 340?

I'm still getting into the motor so don't know any other info on cam or etc, but it does have 4.10 gears. I was looking into changing the top end with the Edelbrock rpm items or should I keep the manifold?







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[Yobie]

I have a 340 with a offenhauser port o Sonic single plane intake. This motor was supposedly built but it has 318 heads which confuses me.

Unless there is something I don't know why would someone use cast number 2843675 (1.78 intake/ 1.5 exhaust) heads on a 340?

I'm still getting into the motor so don't know any other info on cam or etc, but it does have 4.10 gears. I was looking into changing the top end with the Edelbrock rpm items or should I keep the manifold?







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Here is a pic as I think there are a few different models.

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[7212Mopar]

 Are you sure you have a 340? Pictures on the sides of the engine?

[Yobie]

Are you sure you have a 340? Pictures on the sides of the engine?

Ugh your right I'm getting my engines and parts mixed up.  Just picked up a few and it was free so didn't even inspect it. Woops

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[RUNCHARGER]

Those Porto-sonics were highly regarded in the day. I think I would try it it just to be different.

[Chryco Psycho]

I agree , you may find the intake works quite well

[Yobie]

What's a 318 in good shape run price wise? I have no need for this. Would rather it help fund my 360 or 340 build.

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[303 Mopar]

What's a 318 in good shape run price wise? I have no need for this. Would rather it help fund my 360 or 340 build.

Unfortunately not much these days, many couple hundred bucks is all.

[Chryco Psycho]

 
Not many looking for the 318 , if you are building you would start with a virtually free 360 or swap in a modern Hemi

[Yobie]

What's a 318 in good shape run price wise? I have no need for this. Would rather it help fund my 360 or 340 build.

Unfortunately not much these days, many couple hundred bucks is all.

Lol I'd take a few hundred...I have a 340 and a  360 sitting around but I've always wanted to do a modern hemi swap.

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