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Check out this combo that was just posted. Seems similar to yours. And seems like around the 400hp range. 5.9 Magnum Dyno - Cam and Intake

That would be very cost effective. Custom cam, maybe something that works a little better with EFI, using your core...

Something a step or so hotter than the Lunanti he posted... like this? Or more? HYDRAULIC ROLLER CAMSHAFT AND LIFTER KIT; 1964 - 2003 CHRYSLER 273, 340, 360 1200 TO 5700 HOWARDS CAMS CL711915-12 Year:  1964 - 2003 Make:  Chrysler Engine:  273, 340, 360 Camshaft Type:  Hydraulic Roller Basic...

This is a street car you drive around a lot?? Looking for low maintenance and tuning ??? If so... Something with good mid-range up torque and HP. Thinking under .550 lift, under 250 duration @.050, with 110 or 112 (for EFI) centerline. The cam will recommend the springs to use. Should be over...

450-500

I think it’s a good question. I think there’s potential in a cam swap.

Troy sold a ton of those at the old Westoaks Mopar Performance. He said they weren’t great down low, but made good peak numbers (marketing) for a low compression 9.0:1. Most people put them in cruiser type cars, but picked the 380HP because of the high HP number (marketing was right) But they...

Thanks for clarifying. So 5.2 and 5.9 magnum motor take the larger rear main and seal.?? Is the magnum oil pan and gasket different??

Did later magnum 360/5.9 motors take the smaller rear main cap 318/340 pan?

I run a scat balanced cast crank 4" stroker rotating assembly. No Mallory. Under 500 hp, under 5800 rpm

You mean Scat? What CC dish pistons? What was your measured static compression? What octane gas are you using with 36 deg total timing? Did you do any port or bowl cleanup to the heads?

The stroker will be fine with a 5 quart pan. It could run a stock 4 quart and be fine. MP put that ridiculously deep pan to get a few more Horsepower so they could advertise a certain number. That few horsepower will never be missed as you burn rubber trying to get your car to hook up on...

A stroker is inexpensive and cost effective way to make HP and TQ if you are already rebuilding a motor. The torque is great for a seat of the pants "feel" on the street. And since the HP/TQ is made at a lower rpm, you can get away with inexpensive rocker/valvetrain gear like stock 273 or...

TTI long tube or shorties or Dougs long tube. With TTI's, they have headpide and whole systems that will bolt on a fit well all they way to the tips. The headman shorties will take a bunch of work to make them fit in an A-body. Not something for someone short on time.

I got mine balanced from scat. Smooth to me. 5000-5800 lap after continuous lap at the track for me. OU812 (Brian) from IMMengines said he's checked SCAT kits and they had good balance for street strip motor under 500 hp. He could have charged me to have mine balanced and probably made more money.