GDane1

I have a question about the 360 mopar 596 cast iron heads.If I knock out these heads to 2.o2 In 1.60 exhaust with a 3 to 5 angle valve job with bronze guide liners full port and polish.Do you think I can get 450-500 h.p.I'm building a 408 with 10.5:1-11.1 c.r. I'm want to run 92 octane pump premium gas with a octane boost.steel crank and rods with a comp cams hyd.roller with 240-260 @ 0.50 with a 550 lift.how does this combo sound to you guys.I would greatly appreciate any information. Thanks In advance!!!

Skwerly

That's some serious lift on the cam, no? Without knowing a little more about the mill I'd say you are at the very least good for 400 horse, no issues. Thank goodness you understand how important head work is for big power.

GDane1

Do you believe it's possible to get 500 h.p. using the 596 heads? If you do what would you recommend me doing to them besides maching them out to take 2.02 In 1.60 ex with bronze guide liners with a 3 to 5 degree angle valve job with a full port and polished. I believe the 596 heads are 72cc combustion chambers.should I run a smaller lift cam like a 230-240 @ 0.50 with a 500 lift? I'm mostly going to drive it on the street. I have a 727 auto trans.I'm putting the engine in a 2003 Dodge Dakota r/t.what size of stall converter would you recommend a 2500? I was going to use a torker2 intake manifold.I would greatly appreciate any knowledge on this topic. Thanks In advance!!

GDane1

If the 360 magnum heads are better is there a specific gr that produced more horsepower than the others? I'm just trying to figure out if I should invest my money in the magnum or the 596 360 mopar heads? and with the right modifications can I get either one of these set of heads to produce a good solid 500 plus horsepower bolted on top of a 408 small block mopar? are is it just going to cost to much and is it a waste of time and money and I should just save up for a set of good aluminum heads.I'm going mostly drive it on the street. any information or input would be greatly appreciated. Thanks In advance!!!

GDane1

Alright thank you very much for you technical knowledge.so basically if I want to get a solid 500 to 600 plus horsepower what after market aluminum heads would you recommend. Edelbrock performer rpm cylinder heads? And would you use a edelbrock torker 2 Intake manifold with like a holley 850 dual feed double pumper? I greatly appreciate all your technical knowledge and knowledge. Thanks In advance!!!

Skwerly

Yeah, Edelbrock and Dart have real, real good reputations, bud.

Drag Pak

Call / study these guys and open up your wallet.

http://www.hughesengines.com/TechArt...ngsept2002.php.

Longevity and performance is in the details = 100's of hours

Best of luck

GDane1

Alright cool.so how big of a hyd.roller camshaft would you run in a mopar 408 with a set of edelbrock or dart cylinder heads.I'm putting the engine in a 2003 Dodge Dakota r/t extended cab pickup. I'm going to run a 727 auto transmission with the stock,factory 3.92:1 rearend. What size stall would you recommend. And do I need to beef up the stock rearend to be able to have 500-600 horsepower. I'm going to have the 727 automatic transmission rebuilt and beefed up to handle the horsepower. And I'm going to mostly drive it on the street maybe once in a blue moon it might see the track. Would 240-250 @ 0.50 with a 550 lift be to much for the street. Once again I greatly appreciate all of you guy's technical knowledge and help. Thanks In advance!!!

Iowan

250@.050 is a snoty cam you better be thinking a 4000 stall converter.
I've got a little Ford with a cam like that peek torque is at 4500 and that's were you need your stall at so I'm told.

GDane1

So what do you go off of.for instance if I was using a 4500-5000 stall converter would it be alright to use a edelbrock victor,jr Intake manifold with a rpm range of 3500-7500 rpm? Along with a hyd.roller with a rpm range starting out at between 3500-4500 rpm range and tops out at around 7500-8500 rpm range would that be good? And how would this set up idle? Would it idle at all? If not do I need to run a smaller camshaft? Could someone please steer me in the right direction.I would greatly appreciate any technical knowledge information. Thanks In advance!!!

Iowan

Hydraulic rollers don't turn that high, maybe 6k.

Iowan

Here look at some of these packages the Indy has, dreaming big costs big.
https://indyheads.com/newla.html

GDane1

Thanks for the link bud. :-)

RacerHog

Talk to Shane At Precision First.... https://www.facebook.com/PrecisionCylinderHeads/

GDane1

I have been doing alot of thinking and at the end of the day a good solid 400 horsepower for a street car is nothing to laugh at.and also I'm not a rich man. So I'am just going to build a 408 with cast-iron 596 cyl.heads.If I just knock out the cyl.heads out to 2.02 In and 1.60 with a full port and polished with dual valve springs with a comp cams adv.dur 280 230 @ 0.50 with a 480 lift.and use a performer rpm or a torker 2 Intake with a Holley 650-700 d.p. dual feed carburetor with 10:1 c.r. I should be fine right? That set up should get me 400 horsepower shouldn't it? I should be able to run 92 octane pump gas no problem right.how much $ should this cost me $2500-3,000? I greatly appreciate all of your help and technical advice. Thanks In advance!!!

Iowan

I'd say you closer to 5k to 6500 for a performance build.

GDane1

Is that just for the engine? Not counting the transmission and rearend? Thanks In advance!!!

Iowan

I have two friends who have an machine shop who build performance/race motors and that's what they tell me. Crate motors are usually a good deal. Blue print has some good sbm 408s now I'll find the link.
https://blueprintengines.com/collect...-crate-engines
performance over stock cost bucks, you get better parts all the way through the motor than with a stock rebuild. But at this power level your stock axel could live. You could do a performance build on the at you have now and retain OD. Should be a fun ride.

Skwerly

Yup. Always add in unforeseen costs and etc. $5k for a 400 horse engine is actually darn cheap! Just to swap a blown one in any grease monkey shop is gonna cost ya that. But I like your 400 horse goal. You are correct, that is not a street car to mess with. Nobody laughs at 400 horsepower.