Posted By: FASTBACK66
Head question - 11/09/08 10:11 PM
I have a 75 Powerwagon that may have a cracked head (452). My only spare complete heads are 516 off a 66 383. I don't have the down time to have hardened seats installed right now, so how long can I expect this motor to last before the heads give up.
Also, going to the closed chamber heads, will I notice much of a power gain?
Vinny
Posted By: MoparforLife
Re: Head question - 11/09/08 10:21 PM
As for the heads lasting, it may surprise you. In our experience the Mopar heads have lasted a long time with UL gas. A lot longer that either brand X heads.
Posted By: RapidRobert
Re: Head question - 11/09/08 11:49 PM
w/o hardened seats it depends on how hard you run it before there's a problem & you drive like an old lady anyhow don't you Vinny so I think you'll be good.
Posted By: RapidRobert
Re: Head question - 11/11/08 01:07 AM
Vinny you'll feel the difference if you use the 516's just from the CR increase alone especially when towing where the not as good port design of them wont affect you as much at lower rpm's.