Here is a dyno test run by former GM engineer and Trans-Am racer Jerry Thompson back on 2-13-67. It was a test of two experimental
camshafts in a 302 engine. The first cam, p/n 0-261898, had .495" lift on the intake and .465" on the exhaust. The second cam, p/n
0-302190, also has .495" lift on the intake but a slightly higher lift of .475" on the exhaust. Unfortunately, we don't have any of the
other cam specs but these seem to be in the vicinity of what became known as the first "off-road" camshaft, released to the public in
1968 as p/n 3927140. Interestingly, the first cam with the slightly lower exhaust valve lift yields modestly higher torque and horsepower
readings. The chart paper does not show readings beyond 6,850 rpm and, as such, the second cam may close the gap and/or surpass the
other in the 7,000-7,2000 rpm range.