Hey guys, I have a 351 in my 96 I really like it but as usual would like to upgrade it. I talked to a guy at ford racing said the intake on the 351 trucks is very restrictive. How are the heads on these things do they flow pretty well? what are the cc on the chambers? I have been throwing around the idea of the Edelbrock performer truck intake, maybe a set of afr heads(don't want to deal with the exhaust bolting problems with the gt40) and a set of ford racing shorty headers, replace my stock cats with the fox body stang style ones higher flow without the high price of cats(stupid OBDII). I don't want to change the cam as it sits this 351 is SEFI MA gets awesome fuel ecomomy. So what do you guys think? that sound like a good combo? I do tow with it so extra tq is always welcome just with that intake they claim 34tq+ so puts it up to 359 right there if its true.

 

The truck intake isn't restrictive. It flows more air than the Stang intakes did. The 96 will have E7TE heads, same as the 87-95 Stangs and all 87-97 5.0 and 5.8 trucks had. The bottle neck is the exhaust ports with these heads. If anything just replace the factory throttle body with a larger one, & port the heads. As you've already guessed, it's got a good cam. Just needs 1.7 rockers to improve the lift specs. The cam is just a tad less duration and lift on the intake side than the 85-95 Stang cam had.

 

If it's torque you're after, go with long tube headers instead of the shorties.These heads are the same as what you've got, but have been ported: http://www.thumperoforangepark.com/
Compare the numbers. Hard to beat for the price, IMO.

Pete

 

Thoes heads arn't a bad deal, too bad he does not give specs on porting them I have ported a couple sets of sbc heads. With my findings kind of suprised ford kept the compression at 8.8:1 not like chevy did with the vortec350 bumping it to 9.4:1 they made more hp but same tq.
The long tube headers are a nightmare have a set of them on my 92 with a 302 5speed 4x4 they are fine until you lock it in and then the driverside header rub the driveshaft, I went back and forth with hedman for weeks and got no where like the ceramic coating on the passenger side ended up rusting. Thats why I was considering shorties does anyone have a set of long tubes on a 351 4x4 E4OD?
I know the 5.0 truck intake isn't restrictive ports are huge, I look at the 351s and they are smaller I have heard they are a "tuned" set up but still can't believe the fact the 5.0 runners are that much bigger.
Before anyone says it, 393 no I was going to do one for my 92 with it being tore down rebuild from the accident, I already have my stupid powerful 400 that thing pulls hard tore off the tires in 4wd on pavement.

Curtis

 

All Ford's upper/lower EFI intakes are "tuned runner" designs. I'd try a new T/B before shelling out $600 for an intake. The F4TE roller cam gives the motor a boost in dynamic compression, probably why they didn't raise the static numbers. I'm running the same cam in a 5.0 in my 89 Ranger but with a carb (great with a carb too) and it'll ping with 87 octane gas with 12* initial timing, polished chamber E7's and a 9 to 1 or less comp ratio (not sure about the actual ratio, but it's no more than 9 to 1). If you've ported heads before, you can do the E7's easily. What I did on mine was open the exhaust port sides and roof to match the gasket, remove the Thermactor bump in the roof, blend down into the bowls and smooth the guide boss. On the intake side, all I did was smooth the bowls and remove any rough stuff in the passages. Then polished the chambers. After all that was done, I took them to the local machineshop where they did a valve job with a Serdi machine to contour the seats. I can't give you numbers, but the difference is obvious if you compare them to stock E7's. The cam numbers are this: 256/266 degree advertised duration (int/exh) and lift is .422/.445 (int/exh) 116 degree LSA. Adding 1.7 rockers boosts the lift another .030. The 93-95 Cobra rockers are a bolt on swap. Crane also has these in their Energizer line, they made the Cobra rockers for Ford. Change the pushrods when you swap rockers. They don't get rotated by the lifters and wear to a somewhat knife edge over time on the rocker ends.

 

If it's towing torque you want forget the Edelbrock truck intake, the graph they show is a combination of a complete package(heads,cam, intake,and exhaust) that peaks at 3500rpm... hardly what I call low rpm. That intake alone is more likely to cost you low rpm torque due to it's large intake runner volume.
The recipe for big low rpm TQ on the 351 is the stock intake and heads(ported), with a high lift cam and long tube headers. The stock cam is decent, but the closer you can get to 1/2" lift the more TQ the motor will make. Shorties will do nothing for torque, longtubes are the only way to go. The Flowtechs fit the F150s really nice, no rubbing or interferance at all.