This is a good article on the subject. Same engine as mine with three dyno pulls with stock and other heads with the same cam. The stock heads with a Crane cam #363902 pulled 285 hp at 5,000 rpms, and 273 hp at 5500 rpm. You have to click on related photos to the right and then click on the cam picture. At .050 it's 204-216 duration, lift is .456 and .484. The opening and closing specs are very, very, close to the Edelbrock cam.
http://www.mustangandfords.com/techa...dyno_test.html