oh boy, I wish I could remember for sure. I changed over to a Torker on an Olds all the way back in 1978 on my first boat. I'm now too old to remember such details :redface:
But there's a foggy memory of having issues getting to the center bolts....I think they need to be 7/16's head size to work. 9/16's are too big and won't clear the manifold.
I'd say go ahead and pick them up. Worse case, you have fishing weights or wrist rocket ammo.