i have a set of 187 and 416 heads why don't they have exhaust valve seals?
or did they just burn off or did GM not put seals on the exhaust side?

2nd i just got done installing springs locks and seals, i was setting the vavle lash
and the seals where squeaking really bad, I remember i forgot to oil the valve steams after i installed the seals is there anyway they could pull out? i tried right away to shoot some oil between the springs and finished up my valve lash and getting the engine back to TDC - is there anyway the seals would pop off?????