I have a chance to pick up a 284 484 purple shaft for little or nothing and was wondering what your opinions were on this cam? I would be putting it in a 72 Rrunner, 440, stock with a performer rpm, 750 vac sec holley,headers, auto, 323 rear gear. Will it work and if not what would I need to change? I know there are better cams out there, but like I said this one is easily available. Thanks for any advice!

buy it/install it 4 deg adv w a multigroove timing set/break it in w new lifters per "breakin secrets" at www.mototuneusa.com. Assuming your 440 is a low comp one w the pistons ~.100 in the hole so no possibility of VP interference/call it good.That'll change your idle vacuum so to get it spot on retune your dist; initial/total/springs/vac adv in order then attack the carb

You will need a decent(3000 stall) converter and better than 3.23 gears to make use of that cam. Cheaper to buy a grind that matches your combo than to buy a converter and gears.

So the bigger summit 488 cam would be a better fit for this application?

I heard alot a input from 383 guys but how about in a 440? Hows it sound in one? Thanks!

It will certainly be more tolerable in the 440, but will also have a lumpy idle. You will need a high stall like everybody has indicated above.

Will it be ideal with a stock converter? No. Can you get by with a stock converter? Depends on what you can live with. It will likely idle a little above stock at 8-900 rpm so when you pop it in gear it might be a tad harsh. It MIGHT be a little lazy getting away from a light but with it installed 4 deg adv and with a 3.23 I doubt it would be an issue around town, like it will roll out 10 feet and then blow the tires off it. If you can make those compromises, you will be grinning. On the highway it will be a none issue, just grab 2nd (up or down) and wave good bye.

A buddy of mine has a 74 Challenger with a basic 440, 727, 3.23's and that cam. With the so-called factory hi-stall (2200 rpm?) he runs 12.90's

Kevin

larger cubes make a cam smaller. it will be fine installed a little more advanced than suggested.
102 to 103 with a 2500 plus and it will be fine. At least one light spring in the distributor making it a faster curve.

So it's a better choice than the mopar 284 484?

What exactly do you want to do with the car? That .484 is a good all around cam. Sounds tough, makes good power and has decent street manners. It will work "ok" on the street with a stock converter but if you are chasing ET you will be leaving a couple of tenths at the 60 ft mark. Depends on your priorities.

Kevin

I ran the big Summit cam in my 440 for a few years.Had a nice lumpy idle pulled hard.I run a 4 speed so convertor wasnt an issue.Pulled it and put it in a 383 probally 20 years ago.Its still going strong.I also ran 4.88 gears when I had it in my 440.Rocky

waaay better cams out there. I'd pass. That cam doesn't work well w/ low compression and highway gears. I'd pass. Those are NOT designed for "crusing"

Car will be mostly street driven and will run a looser conv. at a later date. Just wanting good sound without totally loosing my low end.

Are you referring to both or just the purple shaft?

The 484 cam (if it's the old style) can be a dog in the wrong combo. I had a similar set-up in a 440 coronet w/ 3.55's. The car sounded great and ran like heck after 3500rpm. It had no low end. I was running a 175 convert and yanked the cam and went w/ the summit 488, it ran much much better.

Summit 488 it is. Any suggestions on an oil additive for break in? Thanks for trhe advice, I'm sure I'll need more!