GT40 heads

**sinful rides** · 02-26-2009, 11:41 AM

As the title says looking for a pair of GT40 heads. Prefer non P heads but let me know if you have any for sale.

Also did these heads come on anything other than cobra's and v8 explorers?

**Killercanary** · 02-26-2009, 11:46 AM

They also came from the 1st gen lightning and the '95 Cobra R. After 97-1/2 the explorers and mercury mountaineers had the GT40P's. If I had to choose between the two I'd run the GT40P's personally.

Here's some GT40's for sale:
http://www.superstallions.com/forum/tm.aspx?m=158401

**sinful rides** · 02-26-2009, 01:48 PM

I'd run the p's also but i've read you need special headers for them. What will work with the p heads?

**jaa55** · 02-26-2009, 02:13 PM

I used FMS shortys, all fords headers are made to work with the Ps now. i think any long tube will get the job done. i also have a set of equal lengths that look like they might have worked but they were getting thin so i didnt bother trying them

**White5.0** · 02-26-2009, 02:17 PM

Originally Posted by sinful rides

I'd run the p's also but i've read you need special headers for them. What will work with the p heads?

im using mac shorties with mine but i had to pound the #3 and #7 (i think) tubes just slightly so i could get the plug boots on. also had to use wires with 90 degree boots.

your best bet is to use fms shorties, i hear nothing but good things about them with P heads.

here is everything you'll need to know: http://forums.corral.net/forums/show....php?t=1014187

**TJH64** · 02-26-2009, 05:47 PM

Are you planning on using these heads on the 408 you are planning to build, which you alluded to in your other thread??

**sinful rides** · 02-27-2009, 01:36 AM

Thats what I was planning with a port and polish and bigger valves. Am I making a bad choice with these?

**White5.0** · 02-27-2009, 02:13 AM

Originally Posted by sinful rides

Thats what I was planning with a port and polish and bigger valves. Am I making a bad choice with these?

putting them on a 408!?

dont do it!

**sinful rides** · 02-27-2009, 02:49 AM

What heads would you guys recomend. I had Trick Flows and they broke on me. I'd like to stay with irons with a 61cc chamber or bigger. Also I'll be running boost also.

**Killercanary** · 02-27-2009, 09:41 AM

My only choice for an engine that large would be a set of AFR 205/225's. Why stick with Iron, especially if your putting a heavier windsor block up front and a heavy supercharger? Aluminum can be repaired too if something goes bad.

Gt40's on that setup... YIKES! That's not a good idea.

**thebreeze72** · 02-27-2009, 10:05 AM

I HAVE A PERFECT INEXSPENSIVE IRON HEAD FOR YOUR 408 ! I HAVE A SET OF COMPLETE N351 CAST IRON FORD MOTORSPORT HEADS THAT ARE MILDLY PORTED AND CUT TO 60CC CHAMBER S/S 2.02X1.60 VALVES ALSO A SET OF 1.6 YELLA TERRA SHAFT ROCKERS LIKE NEW $1200.00 TAKES EVERYTHING MAYBE GOOD SET OF PUSHRODS ETC. ALSO BUT I DON'T KNOW YOUR COMBO ! IF YOU WANT ALUMINUM HEADS HOW ABOUT A SET OF BRODIX TRACK 1'S SET UP FOR MECH. ROLLER 2.08X1.60 S/S VALVES .700 LIFT SPRINGS 54CC CHAMBERS AND W/ T&D 1.7 SHAFT MOUNT ROCKERS AS IS $1200.00 CALL DAVE 724-880-4580

**yeahloh95** · 02-27-2009, 10:06 AM

x2 on the afr's

**White5.0** · 02-27-2009, 01:06 PM

get some AFR 225's

**sinful rides** · 02-27-2009, 01:18 PM

I did a comparison against a few heads. Trickflow Brodix AFR Dart and Racing Head Service on Summits site. I first threw out Trickflow and Dart because of price. The Brodix heads seam to be the smallest of the heads and $1600. So RHS is 10cc smaller on the intake 14cc smaller on exhaust and a smaller valve lift of .550 to .700. The RHS is avaliable in iron at $1080 and aluminum at $1380. The AFR's are larger but are they worth $460 more than the aluminum RHS heads.

I tried to make a link to the comparison but it didn't work.

Also any guess as to power I'll make? Considering buying a sportsman block if the foctory will break>

**Killercanary** · 02-27-2009, 02:09 PM

What is your budget and goals?

**sinful rides** · 02-27-2009, 02:51 PM

I don't want to spend more than $4K. Car will mostly be street driven with a few passes down the 1/4. I'd like to stay with a factory block to keep cost down. I've heard 351's are good to 700hp. I'm only looking to make 500-600hp if the stock block can take it. I plan on using Eagle forged stroker kit with 28cc dish and Jay Allen cam.

**White5.0** · 02-27-2009, 03:02 PM

Originally Posted by sinful rides

I don't want to spend more than $4K. Car will mostly be street driven with a few passes down the 1/4. I'd like to stay with a factory block to keep cost down. I've heard 351's are good to 700hp. I'm only looking to make 500-600hp if the stock block can take it. I plan on using Eagle forged stroker kit with 28cc dish and Jay Allen cam.

you should be fine with a stock 351 block, they are very strong (at least compared to the 302)

**Rio94gt** · 02-27-2009, 11:13 PM

Im going to be running the new Trick Flwo Fast As cast heads on my 408W. Very reasonable price for the performance. $1600 assembeled i believe.

**gmkillr** · 02-28-2009, 01:05 AM

I would talk to Jay Allen and follow his recomendation for heads.

**DMmustangLX** · 02-28-2009, 11:56 AM

Originally Posted by Killercanary

My only choice for an engine that large would be a set of AFR 205/225's. Why stick with Iron, especially if your putting a heavier windsor block up front and a heavy supercharger? Aluminum can be repaired too if something goes bad.

Gt40's on that setup... YIKES! That's not a good idea.

x2 gt40's on 408

AFR's will be ur best bet for what u want to do