[91GTturbo]

[/i]
That said, here’s the cost:

E7 pedestal heads-------------------$317
1.90x1.60 forged SS valves
solid bronze guides
.550 lift HD springs

CNC port, hand finish-----------------$358
3 angle valve
--
Itemized bill
Core-----$150
parts-----$317
labor-----$358
shipping-$87
-----------
total----$912 (you get the $150 core back, and they pay for return shipping of the old heads)


A set of power heads went to a machine shop we use to get checked out after the valves seized in the guides after ~5 minutes of running. The machine shop gave the heads very bad marks. All the intake guides were installed at an angle, the seats were the real old flame hardened style seats that were then 3-angle ground removing the hardening. The valves were extremely low grade, and the valve springs were estimated to work with a stock cam to ~4500 rpm due to low tension. The only good thing said about them was the CNC porting was nice. Power heads would not warranty them and the cost to correct the problems ran ~800 dollars plus having to use ball mount style rocker arms to not wear the intake valve stems from the crooked valve guide holes that Power heads made in the heads. After seeing the problems on those heads and power heads response, nobody should buy them.


I've had Power Heads on my 93GT. E7 castings.
You only pay shipping once. They send pre-paid stamps for the core to be returned.
The Heads gave impressive gains. Better than Edelbrock on my Girls 91GT. BUT>>>I used 1qt of oil every 1000 miles after the swap. The valve guides were most likely the culprit.
The workman ship is very shotty aside from the port job. Who bead blasts heads!!! This left little ball bearings in ALL the nooks & crannies. Including all threads. They say "tap all threads to make sure they're clean." The problem is they also paint the heads, so the beads are painted in the threads. I broke a tap off in one of the valve cover holes. (NOT FUN!)
Because of the "issues" the prep work took 2 days (10+ hours) before they were fit to be installed. Then the oil leak on top of that......not something I'd do again.
Aside from that, the customer service sucks! Took over 10 weeks to get my core back.



I must have got lucky, I ordered my heads and had them less than 3 weeks later. Got the return tag and had my core $$$ in about 2 weeks. Mind you this includes shipping to and from CA.I am in MA, 3000+ miles away.

I have the base springs and a cam similar to the E-303.I am using the TFS Stage 1 cam.

I have no problem running to 6000 rpms with the base spring package. I have a link to my dyno sheet in my sig.

I have no issues with oil use, just added 1 quart of oil over the last 3200 miles.
Heads were not excessively painted, I did take them apart to clean them off, a quickie blast with some brake cleaner. Did not tap the boltholes.

If you do decide to go with the Power Heads, the TFS Stage 1 cam is a great cam for those heads and ~$40 less than the E303.

Crane Cams grinds both cams, so the quality is the same.

Here is just a few of the quote's I found through the internet. There were more good quotes, I chose not to copy them as I just wanted to give you guys a few of the reasons I chose not to go with them myself. I ordered my Edelbrock's through Summit for $925. I just think it's worth saving a little longer and then not having to kick yourself later.