/6...318...or 360???

Try to find a factory 318 4BBL.
These engines are great.
You can find them in cop cars or wagons usually.
They come with a 360 intake, 340 sixpak cam, 340 connecting rods, 360 heads milled to maintain compression, dual roller timing chain, usually have a thermoquad or quadrajet depending on the year.


It's a strong little motor that gets good gas mileage and can run 87 octane.
I upgraded the one I found, and put it in my duster.
The only thing I noticed bad about it is that the aggressive stock cam will sometimes not provide enough vacuum if you have power brakes.

Not true. The cam in them is the same as any other 318 cam. They do have very low 7.5:1 comp due to huge chambers and pistons very low in the bore.

I know because I own one and have swapped the stock cam out.