ZZ 454 exhaust valve height

df396 · #1 03-06-2010, 08:40 PM

I have a ZZ454 that we are about to drop in a 69 SS Chevelle. i was checking the exhaust valve placement in comparison to the steel heads that are on the old motor and the measure 1/2" higher than the old heads. i had a pair of Hooker super comps for the car but after calling Holley and asking if the would work they said no. Has anyone out there put a ZZ454in a 69 Chevelle and what headers did you use? Would manifolds work with the tall deck? I would really prefer to use headers with this motor. Also, if someone has done this did you put the headers in from the bottom, or set the motor in with theheaders tied back on the wheelwells in the engine compartment? This is a power steering car, and the head bolts have been machined to accomodate headers

Thanks,David

**RPOLS3** · #2 03-07-2010, 06:35 PM

I just responded to your other thread on the same topic. I used the factory exhaust manifolds on my swap and had no issues. One of my obejectives was to keep a stock look so I painted the aluminum intake orange and installed the factory exhaust manifolds with the smog system intact.

COPO 70 RS/Z28 · #3 03-09-2010, 04:56 PM

Hey Jake

df396 used to ride around with me in you Dad's 09.

**RPOLS3** · #4 03-09-2010, 06:31 PM

How cool is that?

Dad's been steadily improving it this winter and I hope to have a ride (and drive) this spring sometime.

Jake

COPO 70 RS/Z28 · #5 03-09-2010, 06:44 PM

Great to hear, is he going to change out the tires!!!

I still need to get that part in the mail to him!!!