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I know that this is an old thread but I have a 1973 Plymouth road runner GTX with 77k original miles. Numbers matching engine/trans. I know the history of the car and it hasnt been molested. Still has steel shim head gaskets and HAD the original nylon timing gear. The car has 213 cylinder heads...

Here is mine

Pic of mine

I put together a low mileage virgin 65 race hemi short block and 64 K heads. I retained the original "12.5-1" pistons and used a .098" Cometic gasket. According to my calculations the engine had 13.1-1 compression in stock form but I now have 10.74-1 compression with the cometic gasket. The...

Thanks for the great info!

Has anyone done a Hemi swap from the top? Wanting to know the tricks. This is my first Hemi. I have a 68 road runner 383. I am reusing my transmission so I am leaving it in. I have conversion mounts. My car is manual steering and manual brakes. I am running factory exhaust manifolds. I have...

No. Most of the components are there. Block is pretty nice. Heads need some work.

What you have is what I want to put together. What temp does it usually run?

It is not a dry block. It is still a wet block and is only partially filled

Ok. It is below freeze plugs and drain valve on side of block is still functional

I need to find out a little more info. I am getting mixed reviews on this topic so far.

I was told about 1/3

This is an ex race motor. Old super stock engine. Not sure of HP level

Has anyone here ran a 426 Hemi engine that has had the water jackets partially filled on the street? If so did you experience overheating?