Hello, thank you for your help guys.
I forgot to mention the car has a Th350 trans. I don´t think the owner wants to change out the rear gears, because this car is driven a lot on the street, in the summer it´s his daily driver. He was only thinking about throwing in my old b&m stall converter in the car, but I think the stall is too high for a street car. The converter stalled at about 2900rpm behind my 500ft lbs big block, should be around 2400 behind the 327, or am I wrong?
But anyway the SUM-K1103 cam from Summit looks like a good choice. just need to find replacement valve springs, don´t want to re-use the old springs. I will give the heads a small pocket port job, this should help them to breath a bit better.

If your interested here is a picture of the 1967 el camino behind the riviera.
http://www.flickr.com/photos/whiteri...57629081515217

thanks again, best regards bastian