Rubber valve seal lengths . 273charger

update

got the valve guide seal installed ,, this 273 hp is preety much all original internally so I know when doing the oil seals that All the seals are the smae size the long deep umbrella seals.. but moke overall kits you buy have either both the short and long seals in the kit.. I thought the intakes took the long seal and exh. took the short seals.

Or back in 1965 they installed the long boot seal on all the valves.

I put it back the way is was with all long boot seals.
from what I heard, the shorted seals kept the seal up higher off the seat for heat purposes ... but the ones I installed are about a 1/8" from the seat.. should be fine because the oem seals I took off went all the way down to the seat.
here is a pic pf the seals that I picked out of heads.