410 coils are very common on 68 69 pontiac engines
I have several ... a few never removed from the coil bracket or throttle cable bracket....still clocked in factory position
I have seen 288's 0n 67 and early 68's
just pulled a 410 from a 1 owner 350 69 Lemans one came off a 68 YZ one was on my original intake for my judge ,, I even pulled one from a H 69 70 lemans I parted ....
