Mangum

What is the best heads for our cars N/A and Nitrous? Just wondering if there is a head out there that will make a good bit more power than the Stock heads fully worked.

Thanks for any info.

ProEFI

I'd it's back to me I'll go with Mast or trickflow

ToppThat

Mast if you are aware their 3/4" taller so covers have to be cut.

Mangum

What has to be cut (Valve Covers?) and when you say better how much better as far as HP goes? And also which Mast head are you talking about? Do stock rockers work? Dosent look like the same stands on the heads as the Stock ones. Im sure pushrod length will change too?

Unreal

All Pro
Or if you want big power
Mozez

lane_change

I did a lot of research on this and to me it was between All Pro and MAST for the money. I ended up going with a set of MAST 305cc heads with Ti intake valves and Inconel exhaust valves. They can use a the stock rockers or a shaft style setup, just specify that when you order. If you go with stock rockers you get a small set of rocker stands that sit in the head and support your rocker arms. I just got done measuring out my pushrods and ran into a few concerns with varying heights between intake and exhaust, but they were smaller increments than the pushrods are available in, so hopefully it all works out in the end. With my Lunati hydraulic linkbar lifters, I ended up with a 7.750 pushrod accounting for .020 preload for these lifters, your setup may vary.

I have not tried to mount the valve covers at this time, so we'll see how that all plays out, but the ARH 2" headers bolted right up and the sheet metal intake also fit with no issues even though I was told by other forum members and MAST themselves, that my sheet metal intake would not clear, so who knows what they were talking about, mine cleared fine.

EnginerdVT

I installed mine recently and had NO issues with fitting the covers on after installation (MAST 305). I would probably agree that with aftermarket valve covers, they might contact the alternator bracket. Headers and intake manifold bolted up just fine and I stuck with the off the shelf hollow stainless intake and stainless exhaust with their spring setup. They run this setup on engines all day at or below 7200 RPM with no issues... 500 miles of break in on mine and going on the Dyno Thursday so I'll post the numbers.

lane_change

What lifters are you running and what length pushrod did you end up going with?

EnginerdVT

Brand new set of stock AC Delco lifters, stock LS7 rockers with tunion upgrade and 8.050" hardened pushrods from Comp... I should add that mine are milled to 11.7:1 so they are not stock height!

lane_change

How much preload? I thought mine would be taller, but mine measured out at 7.750 which surprised me, but I am running the Lunati lifters...maybe I need to call them and ask if they are taller than stock which would create a shorter pushrod requirement. I'm also on stock rockers w/ the Trunion upgrade and I'm still running the 70cc chambers since my engine is larger and is already at 11.8:1 with these chambers.

ToppThat

With mast black label heads, valve covers fit even with jesel sportsman rocker upgrade. Coil covers dont fit. Stock rocker bolts pushrods and lifters were changed on mine.Ordered heads with 700 spring upgrade.

0Anthony @ LGMotorsports

Big Power stuff, All-Pro seems to be the way to go. On most of my new big power (1000+ HP) I'll go to the 6 bolt All-Pro head.

For everything else, our race engine shop in N.C. has been doing a killer job on the GM castings for years now and have had ZERO failures with them.

croatbob

mines blown but went mast 305s. only 1-1.5k more than the wcch setup plus u can sell ur stock heads

Mangum

What's the most you have gotten out of a pump gas N/A deal? Ill be spraying it so it will be no power adder most of the time

Mangum

Think I'm looking at it wrong but are those horsepower numbers?

lane_change

What rocker bolts did you change over to? I talked to MAST and they said that ARP has a set, but I have not been able to find a part number yet. I know I can get the LS1, LS2, LS3 bolts, just curious what you used and if you did go ARP, do you have a part number? Thanks.

EnginerdVT

Exactly... After buying the MAST 305s and selling my stock heads, I paid about 300 bucks more than I would have with sending my stock heads out for the work to be done. Once you consider upgrades on the 305s, it's a more expensive story, but the off-the-shelf configuration does just fine for a stock bottom end/NA LS7 sticking with the 7000 RPM redline.

ToppThat

The first mustang dyno was on the car at 7k stock. 2nd after mods.

ToppThat

My builder got them from GM.

GARY2004Z06

Picked up a 100 HP.