I know this probably has been asked buy 500 other mopar guys but I could not be more complexed after speaking with 3 different cam grinders.... I am trying to get my drivetrain built before spring is on its way but you cant control mother nature.

Recently I pulled the trigger on a Scat 400/498 kit to go along with my Bruce Toth ported Pro Maxx heads. Flow numbers I/E @ .500 lift: 280/199 @ .600 lift 295/210 and @ .700 299.5/218.5 cfm which is fairly decent flowing head for what will be a car that is not a dedicated race car but will be a weekend bracket car/cruiser. I have two intakes and have not yet decided which to run, a nicely ported Eddy RPM and a new in box Eddy Victor. Speaking with Howards, Comp and Hughes I got 3 very different cam grinds that have me baffled on how there could be such a wide gap in opinion on what cam specs would get me to reach my goal. I want my car to run high 10's, I am not really shooting for a HP number but if I was I would like to see something in the 600-650 range. I am trying to stick with a solid flat tappet cam. All three cam grinders said its not possible to hit 600hp with my combination but 10.90's are "possible".

Starting with Howards, I was suggested to install a cam grind of 246/252 at .515/.530 lift with a 108 LSA. According to the tech, this would be a stump puller with a lot of torque from 2k and up but never getting past 560hp . I asked why such low lift and he indicated that would kill my low rpm power. The tech suggested a 2500 stall with my 3.91 gear.

Comp Cams was slightly more aggressive in the cam choice, I felt like I was having the same conversation as I did with the team at Howards. The cam they wanted to sell me was their XS290s Solid 252/260 with .540/.558 lift at a 111 LSA. They too suggested a 2500 to 2800 stall.

Finally the tech at Hughes Engines was the guy to suggest the largest cam and a lot larger in comparison to the Howards cam. They suggested SLD FLAT TAPPET CAM 260/264 with .615/.620 lift lobes @108ºLSA again indicated the 600 hp mark was out of reach and to use a 2500-2800 stall converter.


I dont yet have the carb I want but I will likely get something like a Holley XP950 or contact someone to build me one. Depending on the head gasket, I will fall in at about 10.7 or 11.1:1 compression with the 84 cc heads.
I am using a set of Hughes 1.5 roller rockers. My Duster will be running a 727 full manual trans with 3.91 gears and 28 inch tires. Current stall with the 440 is 2800 rpm. I want to be clear, I want my combo to be one that works well together. I understand building a car driven on the street does not make a great race car and vice versa.... I making a lot of changes to the car to help reach my goal including all new front and rear suspension with Caltracs, relocated springs and such.... I just need a little direction on part selection You guys have always been insightful, I hope I can start a good conversation here.