Need advice

[RT K_line]

With that heavy of a car I would probably go with 4.10s or a small NOS kit. My first kit was a super power shot with 125 shot I believe and that dropped et almost a full second. still with 3.55 and 3700# Coronet. I stepped up to the big shot kit but haven't used it yet. I still have the small kit minus the bottle if interested.

 

[Cranky]

Stock heads suck in the valve pockets....the part that's just under the valves. The factory back cut really is bad and just cleaning that up and smoothing the ports in that area will open up a good bit of flow even if you do not do anything else to the heads. Did this on a pair of 360 heads for a teen and 360 heads lowers the comp ratio on a teen but with a few mods (480 lift cam which is big for a teen), some gear and a stock converter, that pos ran a 13.51 @ 102 in the 1/4 in a 72 stock body Demon. You can do all kinds of stuff to any engine but without some breathing, it ain't going to run hard. With a cam, headers, some port work, a decent intake, ignition and exhaust and some gearing, it'll do ok but some simple pocket porting will go a long way in any engine even without a cam etc.

 

[Challenger340]

I'm looking to run a .484 lift 284 duration cam 3.55 gears and a 2800 stall can I achieve 12's with this setup

IMO,
with a wee-83 ?
short answer is NO.
Too many variables to say definitively, but for me it's the 2800/3.55's that say not a low enough 60ft time to lower the E.T. anywhere close into the 12's consistently ?

The Wee-83 needs one helluva hole-shot on 3500 lbs to break 12's ?
As mentioned...
* 4.10's W/28" rear tire
* and an honest 3500 stall at the line to dump the short time down to 1.75 or so ?

 

[383man]

My sons Dart you see here. It had a very stock 383 as it was stock bore and pistons with 452 heads I did some mild bowl blending on and cut for a true 9.5 comp. Stock crank also. I used the MP .484/284 cam and stock rockers. Ran the RPM intake and a 750 DP Holley. Stock electronic dist I recurved with CPPA 2" headers and 2-1/2 " exh. Used a 727 with a Turbo Action reverse manual valve body and the Turbo Action 10" tight 3000 converter. Had an 8-3/4 rear with 3.91. This Dart weighs just about 3600 lbs with his 190 in the car and it ran a best of 12.31 @ 110. Would average 12.40's to 12.50's about 108 on average days and 12.30's at 110 on good days. For what it was it was a nice running combo. Oh I had the cam on a 104 installed centerline also. And the tires we used were the G/60-15 McCreary's. Ron

 

[LemonWedge]

Way more to going fast than just the cam. As others have chimed in, everything in the combo needs to be looked at. If you simply took a stock low compression 383 with a stock converter and gearing for instance, and stuffed an MP .484 cam in it, it would almost certainly be slower than it would be with the stock cam.
Give us more specs on what you have to work with, and what your goals are.

 

[Chris1973Rr]

My sons Dart you see here. It had a very stock 383 as it was stock bore and pistons with 452 heads I did some mild bowl blending on and cut for a true 9.5 comp. Stock crank also. I used the MP .484/284 cam and stock rockers. Ran the RPM intake and a 750 DP Holley. Stock electronic dist I recurved with CPPA 2" headers and 2-1/2 " exh. Used a 727 with a Turbo Action reverse manual valve body and the Turbo Action 10" tight 3000 converter. Had an 8-3/4 rear with 3.91. This Dart weighs just about 3600 lbs with his 190 in the car and it ran a best of 12.31 @ 110. Would average 12.40's to 12.50's about 108 on average days and 12.30's at 110 on good days. For what it was it was a nice running combo. Oh I had the cam on a 104 installed centerline also. And the tires we used were the G/60-15 McCreary's. Ron

Did you do occasional driving with it to like how we're the rpms just casually driving it

 

[LemonWedge]

Before I built my 451, I played with the original 383 in my Satellite for a while. It was an original 2bbl motor, so 9.2:1 compression was what Ma said they built that combo at; probably was lower. Car weighed in at 3770 with me in it at that time. It had stock 516 heads. I added an RPM intake and a 750 Vacuum Secondary carb, a set of 1-3/4" headers, a pertronix electronic ignition conversion, a hydraulic cam around .480 lift / 240 duration at .050 (similar to the MP .484 cam). I put a transgo stageII kit and a cheap Alabama 2800 converter in the 727, and some 3.91 gears. It went 13.70's at an even 100 mph. The only thing from that combo that still exists in the car today is the RPM manifold. It now runs 11.5X's.

 

[383man]

Did you do occasional driving with it to like how we're the rpms just casually driving it

Oh yes as its a street car and it only gets raced once every few years. It drives fine just like and average muscle car. I also set the dist up for a very fast mech timing as its all in by about 2000 rpm and we do not use the vacum advance on it. Total timing is about 38 degrees. No ping and it has great driveability. You can cruise at 1500 rpm or 3000 rpm with no problems at all. Ron

 

[cudatom]

73 Cuda full interior, 440 engine, Speed Pro flat tops, worn out 906 heads old Hemi grind from the late 70's(284 duration w/ .471 lift). I ran consistent low 12.80's all summer long. Ran that set up from 1980-1988. Not sure on the weight but guessing at least 3500lbs.
I did have sticky tires(29*9 slicks, 3000 stall and 4.30 gears). Drove that car everywhere.