You could use the same performance 'tricks' as a car.... high horsepower numbers, and a torque converter that stalls around 3K RPM..... but, that isn't something I would consider 'streetable' as a daily driver. (and gas mileage would be horrendous..... not like that is really a concern a 'race' vehicle, for me, definitely a consideration in a daily driver......) Trouble is, with a normally aspirated motor, at those numbers, all your power is in the upper RPM range, so, you NEED the high stall converter, otherwise, performance suffers horribly. (trying to take off at 1500 rpm, when your torque peak is above 4000...... no, not much fun at all.) Might be able to compensate some with lower gears.... (higher numerically) But, then you would constantly be in a higher rpm range, as compared to stock...... and you would likely be able to quite literally watch your gas gauge do down. I would be WILDLY impressed if you broke 10mpg, even driving like the proverbial little old lady.

But, either way, no matter what you do, likely the SRT-10 will still beat you stop light to stop light. (they have traction control, you do not.....) The SRT-10 also has the advantage of being a naturally torquey motor, simply because it has 10 cylinders.....

Basically, it's a truck. A 6000 lb chunk of metal with the aerodynamics of a brick, and a weight distribution that just flat out sucks for quick acceleration. You would need some FAT, STICKY tires in the back to be able to compete. (which suck for longevity......)

Now, if your truck is a 4x4...... you could *cheat*, and install the NV242 transfer case..... and use the AWD feature that comes with it. But, I suspect at 500hp/tq, you be blowing them up fairly regularly.

 

Are you suggesting I might have 500hp/tq with the monster heads, airgap intake and the COMP .512/.512 lift, 210-220 duration, 264/274 advertised, 112 seperation 900-5200 rpm cam? the recommended stall for the cam is 2k. I do have a 4x4. 205mm HD front axle, 9.25 LD rear axle, 3.92 gears. Right now with stock 360 I'm at 2k rpm at 70 mph. It's a flame red 3rd gen body laramie quad cab with the 360(isn't it the last year they put 5.9l in?) Black leather interior. Used to have chrome bumpers and grill 17" alloy wheels. Kept the black fender flares, minimal rust. Now black powder coated bumpers I repainted the grill myself and got 20" black 2" offset rims with 33" tires, no lift or leveling kit(may level it when 408 is finally in). im keepin this truck forever! Sorry for getting so off topic lol....

 

Not sure how your numbers would come out there..... There are various calculators you can download, that will give you a ballpark figure, but, the ask for some pretty esoteric info........

03 may indeed have been the last year for the 360......

 

My buddy is getting his list together of what he got and how he got it street able. I honestly can't find my list (which makes me mad). I'll find it the day I am not looking for it or when I start to finish my new one 😂 03 is the last year that I know of that the 360 came factory.

 

Good deal, I'm curious to see what he's got. I've done more research on IMM.. I believe they take EQ heads and port and polish them for a 30-40 cfm boost in intake and 20-30 in exhaust. It's hard deciding on a cam.. I could build the engine based on the cam, or build the engine and match the cam to the build.. 112-114 lobe separation and low RPM range.. but the lift is hard to determine.. the more the merrier in a 408? I feel like a found a good one but I'm afraid that with too much lift(this cams .512/.512), saturation will occur. Th EQ monster heads allows .6 lift but says if you use over .525 lift, adjustable rockers must be used. So the cam would run comfortably I think. Do either of you know what the compression ratio bumps up to with the 30 over bore and 4 inch stroke?

From Iowa btw.. my truck as of now sits with no tailpipes or muffler, never been pulled over(knocked on the table when I wrote that) Been told a lot that it sounds great

 

Compression ratio is a product of the pistons installed. Your shortblock should have come with a spec sheet, that will give you compression ratio vs, head chamber size......

 

Ive done a lot of research since we last talked. So my first question, is there a reason to not use a hughes camshaft? Magnums need a little more exhaust lift and/or duration since the exhaust valve on the heads are a bit smaller( unless I tried to use LA heads but I'm not). IMM heads intake n exhaust are 2.02/1.60 like those engine quest heads you suggested, but IMM does a valve seat job. They also have beehive springs that allow .625 lift(I don't plan on running that much but later on I could if I needed to). Hughes has some nice looking cams number wise.. a hipotek
Cam I found says it is a 408 torque monster but the rpm range is 1400 or so. Edelbrock fully ported rpm heads have 2.08/1.60 int/exh and allow more intake flow at 300 some cfm but are $3k instead of IMMs 265-270 for $1.6k. Edelbrock only allow .580 lift with offest rockers. IMMs heads definitely seem worth it since their flow is so good without being ported. Hughes says when you think you've decided on a cam, go 2 steps up from that cam for a 408 since the 408 will treat a cam like it's smaller. What do you guys think?

 

If you are looking for low end grunt, the 2.02 intakes would be better. (higher velocity flow at lower RPM, better bottom end grunt)

A cam designed to develop lots of torque, IS going to start fairly low in the RPM range. Just the nature of the beast. 408 isn't going to be a high rpm motor in any event.

What intake were you considering? I think the kegger would be rather restrictive on a 408.... Hughes air gap might be a better choice.

Don't forget the higher stall converter for your trans either. Not to mention you are going to have to build the snot out of it in order for it to last behind the 408.

 

If you buy the IMM heads, talk to them about what cam matches your set up.

 

Noo way am I using the kegger lol.. I'm gonna use the airgap. I tried asking IMM what cam would match their heads with the airgap but they said they'd make a recommendation after I purchase them. I guess I was wondering if the 1400 rpm cam would too high for that low end grunt.. decisions decisions...