I am contemplating a change of cylinder heads on my HEMI. The valve guides on the MP heads have gone away. My intake valves show the tell tale carbon build up with oil on the valve stems.
I would like to step up the performance while curing the soft valve guides. Having lost an intake guide while driving on the street, I am hesitant to just rebuild the MP heads.
The Edelbrock head presents a problem. Their tech says that a 4.350 bore is the minimum that the intake valve will clear.
Stage V looks good but their add says that the intake port is "larger than stock" Edelbrock lists a 245 intake, what is the stock intake volume? Stage V says that "street" porting is required. What is needed for a street only 540" HEMI with tight converter, Gear Vendor overdrive and 4,150Lb street car? Do Stage V have to be ported to run?

Edelbrock is the best deal out there but if it won't clear your bore size that doesn't help you. Every set of Stage V's I've bought, the ports weren't finished. I had to take them somewhere and have them completed. (That's expensive.) The best way out for you is when you take the heads off, notch the bores with a Sunnen cone. It sounds hard in the car with the pistons in but it can be done. Edelbrocks are such a good deal it just doesn't make sense to run anything else right now. If you need help I'll guide you thru it.

This is what you will end up with after sanding with a Sunnen cone.

This is what the Sunnen cone looks like. You just stick it in there and move it up and down until you have it perfect. You will have it marked with a magic marker. Just sand to the line you have marked. It's going to be harder in the car with the pistons in. You will have to move the piston to the bottom and stuff some rags in the bore to keep the grit out. Don't get in a hurry. Take your time and don't get any grit in your engine.

There is nothing wrong and a lot cheaper to have your mp heads gone threw. basic stuff.

What Jake said. New guides, seals and a good valve job and you are good to go. With your cubes I would have someone like Modern Cylinder Heads do a CNC port job also. That is the setup on my 528 and I am happy with it.

Goodson's sells than sanding cone as well.

https://goodson.com/collections/chamferi...one-mandrel-kit

I've been trying to get Bob at MCH do my SS Hemi heads for two years now. I drove up there last summer and he said he would start on them "next week". I filed a complaint with the BBB. Michigan Attorney General is next.

For sure, new guides and a valve job is way less expensive than new heads.

New Edelbrocks are $2,600 delivered to your door. You have 540 cubic inches. To bring your heads up to speed for this size motor will take CNC porting, new guides, bigger intake valves, valve job, freight to and from (UPS is high) & more. (Yes, your bill is liable to be more than $2,600.) If somebody gave you your heads for free it would be a bad deal for you try to make them work for your engine. Buy the Edelbrocks and sell yours for cash. You will be money ahead. Way ahead.

Like someone already has shown, a valve notch for the intake. Can also be done with a half round fine file, as long as you're doing it by hand. We have a cutter on a stem that goes in place of the valve. Put the head on, and mow it down.

Im with Rick; I would get the right heads and sell yours. Feed them 540" right.

You have a point, rebuilding my heads is an open ended deal. I SHOULD be cheaper but there always seems to be the unexpected.

I have the MP heads on my 572...mid 9s on motor at 3800+ lbs. Send your heads to MCH and have them replace the guides and CNC port them.

I guess I’ll be the outlier here......

IMO...... for a 4150lb street only vehicle running an OD trans, it doesn’t need max ported(cnc) heads or race inspired 245cc Victor heads.

Properly set up OE replacement style heads with some bowl blending would be just fine in that application.

Those edelbrock are not better than the mp heads that have been ported. they flow just a little better than stocks. So in the long run it is still cheaper to do yours up.

I don't think he needs max ported heads to drive a convertible to the grocery store. The problem here is the price of the Edelbrock heads is only $2,600 delivered. If he is going to ship his heads to a hemi type person to repair, the freight will probably be $50 each both ways. That's $200. He can probably get $1,600 for the heads he's got. So his bill would have to be under $800 for the repairs to break even. And if he did get them done for $800 he would have used stock heads instead of new CNC ported Edelbrocks. And we won't even discuss how long he will be down while the heads are gone because we don't know.

Just to be clear, the Victor heads are not cnc ported, they are cnc “machined”.
They’re nice heads, I’ve had two sets through the shop...... I just don’t feel they’re the right choice for this application.

If reusing the current heads is off the table, the latest version MP heads made by edelbrock would be the right choice imo.
Next would be the Indy SR.

Both would need some prep, as would the Victors.

Call Tim at FHO,905-797-2459 to see if he has a set of the Stage V that will fit your needs
I bought the heads, intake set up for dual 4150 EFI throttle bodies and rocker arm assembly at a very reasonable cost
Big C.I. motors need big air to perform well