what year 455 heads?
in 1970, the 455 heads were supposed to have the same size combustion chamber as the 1967-69 430.
Member
ok so i have a wildcat 430 and a pair of 455 stage 1 heads that i was going to put on, will i be losing power and about how much?
thanks
what year 455 heads?
in 1970, the 455 heads were supposed to have the same size combustion chamber as the 1967-69 430.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
Member
i believe that it is either 69 or 70 but i have to double check the numbers tomorrow.
Member
ok just measured then they are the bigger valves, but the casting numbers say it should be a 69 400 or 430. or a 70 455, any thoughts. and how i measured was the widest diameter, and i got1.75 and 2.125 is that right?
Sounds like you have a set of Stage I heads
WEBNOTE: When inserting an email in a posting, use the "smilie" @ so that web robots don't pick up your address and send you more junk mail!
Members can be contacted by clicking on their "handle", but you are much better off to post to the thread!
Member
yea but wont that not perform as i want though? will i be losing hp or torque
Stage 1 valves are supposed to suffer shrouding when installed on a 400ci bore. they're supposed to be okay on the wider 430.
also, the larger valve bumps compression by taking up more space in the combustion chamber. the factory numbers say it's good for 1/2 a point in 1970.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
Posting Permissions
Bookmarks