.070 in the hole? Damn!

that's sort of typical of 440 replacement pistons if you don't get the 6 pack piston , better than .180 in the hole smogger piston.

The 2266F will be .070 in the hole.

His block and 516 heads are essentially a 1966 440. With the 452 heads, a 1971 engine.

Looks like a good candidate for a Comp XE274 or PP280 cam.

A little bowl work will be worthwhile on either set of heads.

Depending on how good the heads end up, should be close to 400hp.

With something like Stealths, an RPM and DP carb I’d expect a solid 425hp+.

Sounds like a 14/13 sec. combo to me. Nowhere near the potential to me. A BB head will go 210 bone stock easy, You just need enough cam to get the HP
Think of stockers they are at stock valve sizes, heads, and comp. ratios and have been 9's. Now they run 270/280 at 50, I am only suggesting 240/250 something.

What converter and gears are we talking here?


I agree with the bowl work if possible can't hurt to much there if you have the tools and inclination.

There you go ....

where's the OP ???

One of my old combos:
-Re-ringed 1968 short block
-346 heads with literally a NAPA store VJ, stock w-upgraded springs, zero porting
-Crower 271HDP cam, stock rockers
-original Torker/780vs/1” open spacer
-moroso under drive pulley
-1-3/4 headers
-factory 11” high stall converter
-4.10’s, 29.5 x 10.5 slicks, SS springs
-3575 race weight

Best of 12.12@112
Shift at 5K, thru the lights at 54-5500

With a std performer and a stock bottom pulley it ran constant 12.40’s @110.

I won some $$$ with that combo.

It probably would have been around the 400hp mark on the dyno(the Moroso chart shows 385 for 112mph@3575lbs).

Do you think more cam and a bigger better carb say an 850dp would make more power?

In other words could the valve jobbed re-ringed 440 made more than the 430hp? I believe there is a lot more left. That's not even a big hydraulic (222 at 50).

Every time I have increase the carb CFM on any semi race,(street and strip also) 440 motors the car went quicker and faster
IE from a single plane Eddy intake (Torker and then to TM7 later) with a 750 Holley Double pumper swapping to an 850 CFM Holley double pumper and then up to a Holley HP 950 CFM. same thing going from a 750 CFM on a Torker to a stock six pack set up and then to a dual four barrel tunnel ram set up with dual 750 CFM double pumpers

IHTHs

Of course there’s more left.
How far you take it depends on what the intentions are for the car.

I ran unported 906’s on my 383, which made nearly 500hp with a very basic bottom end.
It went low-11’s at over 3600lbs.

That doesn’t mean it would have made for a great street cruiser.

I stand by my cam suggestions for someone looking for a 440 in the 1hp/ci range……… with the aforementioned DP/RPM/bowl work.
With the OP’s intake & carb and no porting it’ll obviously be less.

Sure, you can get some of that back by adding a bigger cam, if you’re okay with whatever reduction in street civility that comes with the added duration.

Built a stroker 440 with ported 915 heads, 2.14/1.81 valves max wedge rockers, .718 lift Crane roller cam, 12.8 compression. Don't know the horsepower but the 3100 pound Dart ran best of 10.03 at 133 mph with single 1050 carb on a Victor 440 intake. Outran many aluminum headed 440s, they were not happy this factory iron headed 440 was out ETing them.

Its the combination