02WHITEWS6

iTrader: (3)

Any one here have Pontiac 867 heads that drive them on the street? I have heard that since the valves are so big that it isn't good to drive them on the street. Something about the valve are to close together and they click agianst each other. All I'm going to do is drive to and from the track and maybe some cruise nights.

ulakovic22

iTrader: (12)

That doesn't sounds right. If they are so close that they touch, that's an all the time thing, not a street only issue. What are the valve sizes?

02WHITEWS6

iTrader: (3)

They are 2.10/1.625 with 62cc combustion chambers. I don't think it sounds right either.

mrdragster1970

They better not be touching.

firechicken76

iTrader: (14)

Most pontiac heads are 2.11 1.66 or 2.11 1.77

the earlier pontiac heads have smaller valve size....389 and 421

http://www.pontiacpower.net/headcast.html

slow trap

iTrader: (22)

i believe he is talking about the pontiac heads for an sbc,i have heads very similar=the bowties/w 2.1 intake and i think the e is 1.625 but can't remember but i drove it quite a bit and you shouldn't have to worry about the valves hitting each other even though they are very,very close.

TORKER

I have those heads on my 355 ci .Make sure you check piston to valve clearance 99% chance there going to hit you ll need to get pistons fly cut.This is because the valve spacing is 60/40 which means the intake valve is moved away from cyl wall for more flow.the other option is to buy pistons je ,srp ,ross to fit brodix 10x heads. its hard to find info. on those heads i had to use bbc pushrods to get the right lengthand 7/16 studs that were longer, some of those heads take offset rockers.When i was looking for info i went to speedtalk.com for help