440 with 245 @ 50 cam 752 heads stok valves run 7 .99 what improvements
Can I make

Gonna need a lot more info:
The rest of the engine combo
Converter
Rear gear
Car weight if known
Even weather & altitude you run at
Also, main usage of the car and what you're willing/able to do/modify/upgrade
Wallet size might matter, too.

Approximate conversions:
7.99 in 1/8 = 12.40s in 1/4
7.50 = 11.70

Mopar 175k converter 3.91 g
ear 67 belvedere

This may help establish the necessary targets:

www.wallaceracing.com

List your complete build if you want serious help. Based on what little info given I would say more converter MAY get you there. Head work would help as well.

To make any car go faster you have to work on it to find out what it needs to go faster, starting from the front bumper bolts to the rear bumper bolts and everything else in between them :

Ok so more details, 67 belvedere
440 with six pack pistons
452 heads stock valves with bowl work
Herbert 245@50 510 lift installed at 108
Mopar 175k converter, 727 with 3.91 gear
1 7/8 headers, tm7 intake with 750 demon carb
275/60 drag radial

Car has run 7.99 with a 1.80 60 ft at 84 mph

Try a 850 cfm carb for a start, maybe you can borrow one? Next steep looking for a good 10" converter... Turbo Action or another good brand.

What is the ignition timing set at though the rpm range?

20 base 36 total at 3000

With 3.91s, you should tell a difference with the timing all in earlier than 3,000. With those gears, I typically shoot for all in by 2,000 as long as it doesn't ping in high gear when cruising.

Does anyone else feel that the 1.80 60' is too soft? 1.60 should be a reasonable target that a street car could achieve. That alone should put the car nearly half way to the desired goal. And the only way to get there is to experiment, experiment, experiment. A Go Pro to shoot the rear at launch can be a lot of help to see what is happening.

It does seem a little lazy down low so speeding up the timing may help
I have a set of source heads with a good valve job and blending to
Install and thought of advancing camshaft to 104 degrees
Sof far have not had any real traction issues

I would lock the timing if it will start like that, if not all in as soon as you hit the throttle.The 60's are slow. If that doesn't get it to go then the converter ain't right.

Any idea what the actual flash stall speed is.

Has the car been weighed with driver.

In a nutshell, the typical street/strip 3800lb car that isn’t all that sorted out will take about 525hp(STP corrected at the crank) to run high 11’s in the 1/4.
The less optimized the rear gear and converter are..........the more power it’ll take to cover up for other deficiencies.

Looking at HP alone, at 3800lbs........to go from 12.55 to 11.75 will require a gain of about 80hp.

If they can get .2 out of the 60 I bet it would be close to .5 better in the quarter.

I do not have a way to log it but I'm thinking it flashes around 2800

If you’re chasing ET, there is def some left on the table if you’re running a converter that flashes 2800 coupled with a cam that’s 245@.050.

This is where the soul searching has to begin......... how much street friendliness is one willing to give up to knock the ET’s down.

My mid-11 combo from 1991.......
3575lbs
448 making 500hp(mild ported 906’s, RB ssh-44 cam, 2” headers, Torker 2, Holley 850)
10” converter(almost 4000 flash)
4.10’s, SS springs, lite weight wheels and tires, 29.5 x 10.5 slicks

Went mid-11’s at 118

The change to a 9” converter that flashed 4900 and some 4.56’s resulted In low 11.20’s@121+

If you’re serious about chasing ET, first thing I’d try is unfortunately one of the least enjoyable to do..........the converter.
I’d get a 9.5” in there.

I have been planning on a new converter anyway,
I guess the time to change it will be when I install
The source heads since the exhaust will be out of the way.

Think I'll give ta or Fti a call monday

The heads swap and converter change will put a smile on your face and likely get you to your goals.
Your plan seems perfect to me