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fishy, I didn't order them they were ordered by Mad Dart and sent to me from them so I didn't talk to anyone there.

OK, consider it done.

Louis, The top of the stud is the same but the bottom is a small 5/16 where as the sbc are 7/16, alot more strength IMO. The only problem that I see is that they may be too tall for the valve covers with the girdle installed.

I agree.

Dave, I used the factory 8mm valves with a large back cut and a narrow .030 wide seat. But keep in mind that I already did work to these to get the #'s.

Ram, Theres plenty of room for the larger studs, even in the port where the stud boss is. I don't really see a problem there but I'm restricted on these as they belong to Mad Dart, and what he says go's.

You would be looking at $450.00 plus shipping. This would be for enlarging the valve seats and recutting the bowls and flowing the heads, cutting the guides and the spring pads.

The thing is that when they cut the seat in the heads that they left a fairly large ridge in the bowl area that I removed and I narrowed up the VJ and use a back cut valves on both the intake and the exh. sides. I also took the short turn down a bit from as cast, and redid the radius on it. I...

The exh. side is like a W-2 and there's alot left there for porting but I didn't want to get the exh. flowing too good or at high RPM's it will have a chance of running lean. Sucking the fuel/air charge out the exh..Now if your going to use NOS then port away. I could see the exh. going 230 ish...

I recieved these heads from RHS, and I must say that I don't get impressed easily. But these recieved my attention. They are some very nice castings, clean and heavy, more so than a stock casted head. The machining on them was very good for production castings. The bowl area is as I figured it...

Thanks Scott for the shamless plug. LOL

Stage 6's are a Mopar head, check with who has HP Mopar parts, dealers, Mancini, Bill Bagshaw, etc., etc.

There should be about 3/16 of material there and you only need about a 1/8.

You could take the heads back to the machine shop and have them cut the holes more toward the rockers with a end mill thats 1/2" diameter, then get the right length pushrods and you should be set. The pushrods that we use are 7.070 for hyd. cams and 7.340 for mech. cams. If your shop can't help...

That makes this a real option with adjustablility.

What is the cost verses the metering block conversion from Holley? The Holley is $40.00 without the float or the extentions, but you can get the flat type extentions from Mr Gasket for $10.00 and use the std float. Just courious to see which way is cheaper and achieve the same job. I know QF is...

Thanks Mike, I just finished a engine for 72scamp_swinger and this is what I did for $4,900.00. Picked up and delivered to Huntsville, Al. 318 engine Bored .030 New KB 167 pistons New crank new cam brgs. new custom ground cam square decked .027 balanced assembled new roller...

A good set of Stage - 6 or Brodix B-1- BS will get you into the 9's fairly easy. But alot of this has to do with how good your chassis is and how much your car weighs, gearing and tire size, also how much converter or is it a 4 speed.

Glad you liked it, it was for your info only, keep it in the memory bank for use later. I don't generally give this kind of info out, and I have alot left that is never said. Thats where all my R&D has paid off.

What do the plugs look like?

Yep there ya go.

Very well put Moper, I agree 100%. Heres something else that the guys here can use. If you have had your heads flowed and have the actual flow #'s you can determine the HP that they are capable of making. Add the flows up from .100-.500 without the .050 numbers and divide by the total number of...

Not to steal this thread but did you know that Joe had moved from California to Crossville TN. and has opend up a porting school there.

Moper, Your correct and you beat me to it, I could post a picture but you'll never see the work that really counts from a photograph. About the only way to really get the gest of what has been changed in a head, is to do a port and compare it to a stock one right next to a known good flowing port.

The short turn would change on every head depending on what engine the head is going to be used on. If the cam is only going to be in the .480-.520 lift range then I would leave the short turn as tall as I could and not radius it any. As this makes the air flow peak really quick and this is what...

Yep that was done by someone else, those are Mikel Beck's heads. On that head it had a water leak as the one who ported it before went too far and I ended up building Mikel another head to match the good one. So he had a matched set. And because I was the last one to work on them for him I did...

I just cc'd the factory iron magnum head and the intake runner cc'd at 154 cc's. 25 cc's smaller than the Indy/RHS head in as cast form, this is a bunch. For a comparison this is the difference between the 318 and the 360 heads. The 318's having 120-122 and the 360's having 150-153 cc's.

There are plenty on the www.bjrracing.com site under hpim and Bob LaBrecque's car, Brian's Eddy's. I posted them there so everyone can see, I've nothing to hide.

But this is where your missing the point, it's not the .500 max lift that your cam is but what is the flow under the curve? Is it better than the factory or equal or less, then you have to look at port volume CC's and what do both have as cast? If one has a larger port volume then obviously it...

1wild, I have a good question for you, if this set of heads flows over 250 and they show to flow 252 @ .500 but the low lift flows are weaker than a set of mildly ported irons, how are these heads going to produce more power? If the same money is spent as compared to the cost of these heads...