Yes I do have an HEI ignition on it. The camshaft that I put in is a Clevite, the specs are as follows:

.509" valve lift (intake/exhaust)
224 degree duration (intake/exhaust)
108 degree lobe spread
All durations measured at .050"

As far as compression is concerned, I believe it's stock. I haven't changed anything that would alter it. I don't have my manual handy but I believe the stock compression is 8.5 to 1