[69hardtop]

I need help identifying some of the components in my valvetrain. The background is I’m considering a cam swap, the car is a 69 GTO with the original 400/automatic/3:23 rear axle ratio. I’ve had the car over twenty years but I’ve never been happy with the way it runs. Engine was rebuilt by previous owner, he couldn’t remember much other than its thirty over with “a ram air cam”. ��
I’ve always thoughts it’s over-cammed, never will pull much more than 13” vacuum. The vacuum is steady, I have very good static compression and the car does run strong mid to higher rpms. However, no matter how much I tinker with my Cliff rebuilt carb, I can’t get it to idle very smooth and there’s no doubt I’m pouring unburned fuel out the exhaust.....I’m guessing a lot of overlap in the cam. While it sounds great at idle, it’ll burn your eyeballs out after awhile.
So, since cam is unknown, let’s start with more basic stuff. I have these nice looking roller rockers, again source/ratio unknown.....no manufacturer or ratio marked on them. Anyone know what these might be ? When I search this forum I see Harland Sharp that look about right, but I’m not positivel. Note that they’ve been clearanced on the underside to possibly clear the studs I’m guessing. They’re also at least 20-25 yrs old based on guessed engine rebuild date. Pushrod length is right at 9 1/16 ball-to-ball and lifters are 2 inch height.
I really need thoughts on this - since I don’t know the rockers/pushrods etc do I just buy all new ? I recognize cam/lifters get replaced together, but hate to also have to purchase new pushrods and rockers if not needed. Should I wait until I pull the current cam to see if it has any identification marks....or just trash can everything and buy all new
Thx in advance