What does the converter flash to on the line now?

Did you mill the new heads before installation?
New CR?

5300 , The flash speed didn't really change, about 100 rpm more over the 240 heads according to my playback tach.
No , I did not have the heads milled.

What is the combination that you have now? How much power do you think the engine is making in the car?

My Satellite 60's similar to yours . 1.48-50 average . Off the footbrake low rpm . Goes .44-47 off transbrake . I also feel its a bit soft but havent really worked out why . I know with 30"radial it probably wants 4.3 gears rather than 4.1 . Not happening .
Mine is on the heavier side .
I know/feel with the 10.30s footbraking it should go lower 40s .

Tex

The combination is a .030 440 with 270 heads , A trick flow max wedge intake, a 4150 series 1000cfm carb, the cam is a Hughes engines 260/264 @ .050 cam with 1.6 rockers , 2" headers , 3" exhaust system. The car has 4.30 gear , 9x30 tires, a dynamic brand 9 " converter that flashes 5200-5300 range . Car weighs 3655 with me in it.
Using the Wallace calculator the engine is in the 625 hp range . The 270 heads picked up about 3.5 mph over the 240 heads , same track with similar weather conditions.

I did a timing sweep and the best mph is 34* total. I used a wide band for a/f ratio tuning. The engine likes 13.1-13.4 at WOT when I jet up into the 12.8 -12.9 range the car slows up.

I would be interested in thoughts about the exhaust or the carb being a restriction with the 270 heads .

Roller cam or flat tappet? Typically we see over 700 hp from a 270 head engine with 10:1 compression, 260/264 roller cam, TF intake with a 1050 Dominator. The 4150 might be killing a little bit of power but not 100 hp so I'm guessing it is the cam

Could be something else entirely. Had a customer recently who was very disappointed with the performance of his 850 hp Mopar big block that we built for him. His car wouldn't run anywhere close to the number that 850 hp should produce so he was doubting the dyno numbers that we had given him. Until the car slowed down so much that it would barely move in the pits. Then he figured out that his 727 had been eating itself up. Once he got the transmission fixed the engine went back to making 850 hp!

Again beautiful car! The exhaust system and underhood air aren't helping you realize the numbers you'd see on a dyno. I'm surprised the converter is flashing higher than it did with the smaller heads. Those 2 changes would probably get you to where you want to be. But of course a roller and 4500 carb will pick it up. If you're not running an extended reach plug that might give you a couple numbers. There's always oxygenated fuel too.

Based on mph alone, at 3600# you picked up ~55 hp with the head swap. At 0.600" and 0.700" lift the 270's are about 20 cfm better than the 240's, and at 2 hp per cfm you definitely got the HP improvement from the heads. Agree that maybe exhaust or a different induction setup migght get you another tenth or so. If it's full 3" exhaust it's probably a choke point and worth trying cutouts. Again, absolutely beautiful Charger!!

In my experience a looser converter has always been quicker. You run plenty of mph to get to 10.50. It would be nice if you could borrow a converter to test. I ran 10.50 index for years with 127mph.
Doug

The cam is a flat tappet , I talked with two engine builders about a roller cam, both discouraged the swap, I was told there would not be to be a significant change in hp in relationship to the cost of a roller setup.

The cylinder heads have been a definite improvement. I'm starting to realize that making a big car fast is not going to easy or cheap. LOL

my next step is going to be to take exhaust off the car for my next trip to the track. And see what happens. I bought 18" collector extensions to put on and try.

My old pump gas street Duster would loose .0003 to .0005 E.T. and .2 MPH with the full 3.0 inch exhaust system on that car, I think the differences was the lighter weight, the muffs were mounted behind the rear end between the 1/4 panels and stock rear sub frames, the head pipes ran under the rear end housing directly from the Hooker A body B engine headers were fender well exit with 1 7/8 primary pipes and 3.5 inch collector-

Be careful when testing the new combo please

Beautiful car. good move with the exhaust. If you can , my 2 cents for what its worth is loosen the converter. If you want to spend money try 2.77;1 low gear. 3700 lbs will like it by a tenth if you can hook it up

I think the easiest change that will yield you power is to try a Dominator

Might be time to switch to an 8" Converter and as others have said the Solid Cam is maybe a little small, and you'd probably benefit from a bit more lift.

TBH I'm happily surprised for you that the heads are picking you up as much as they are.... with 'only' 440 cubes. Have your shift points changed?

To work the 270's you may need at least a couple 100 more rpm.

Does your charger have a spoiler on the front? B bodies pick up a lot of air underneath so they might help your top end MPH.

This. I picked up 2 tnths on stock stroke 440. Thumper 1050.