These are the figures I derived when I degreed the stock cam during my engine build. I couldn't find any stock specs so I checked when I installed the stock 1990 roller cam. All figures @ .050" lobe lift. The figures should be very close, although absolute accuracy is not guaranteed.
Intake opens @ 20.5* ATDC, closes @ 27.5* ABDC, 187* duration and .250 total lobe lift.
Exhaust opens 30* BBDC, closes 26* BTDC, 184* duration and .255 total lobe lift.
I have a cam from an '88 also and I did not install it so I do not have the opening and closing points, but I did install it in a jig I made to check the lobe lift and duration. The cam appears to be square, 180* duration on both lobes and a little more lift @ .260 on both lobes.
Interesting that both engines have the same ratings and I have heard several comments that the cars feel different between the two years even with the same gearing and tire size? With the very mild specs, it is no wonder they run out of wind at about 4500 rpm.
From Smokey Yunicks engine experimenting, little is gained from lighter lifters, pushrods and even rockers to increase the rpm potential. It does seem contrary to logic, one would think all would make a difference, but the springs, keepers and valves are where lightness has the greatest gain. At the rpm'* we are working with, it should make little if any difference. We are running 1/2-2/3 the rpm'* he was working with and smaller valves as well.