Just bought a 47 Plymouth with a 1970 340 engine. The car has a Vintage Air unit under the dash, and it looks like all I really need is a compressor. I'll have to go with a chrome one since the whole motor is done up in chrome. Summit has a few to choose from, but how do I know which one to choose?

Sanden makes hundreds of compressors, all with slight variations such as:

- Port location (horizontal or vertical)
- Port thread size
- wiring connector type
- Pulley size
- Dimensions (a,b,c,d,e) shown on their website.

http://www.sanden.com/index.php?productsearch

Vintage Air supplies a 6668 model with their kit.

4664, 8104, 4639, 4644 & 4647 are all direct replacements for the 6668.

I used a Vintage Air bracket and a #4471 so the fitting would come straight out the back (horizontal) versus the vertical ports on the 6668 for my 340 install.

Thanks man! Huge help!

My 360 had single groove pulleys so I used the Bouchillon bracket.

http://www.bpeusa.com/BPE4730.asp

It uses the short compressor which they have polished.