Ya things have come long way. How nice it would be to have a dyno and play with different combinations. Thanks for clearing that up for me.

Not much info to go on...

The last stock bottom-end 9.5:1 440 I ran was making maybe 425-450-ish HP (low 12s) and ran great... right before it popped a rod bolt and turned just about everything below the heads into scrap metal.

Are your .030" OS pistons OEM-type cast or heavy TRW-type forgings? Neither are gonna be happy turning a lot of RPM, IMO.

Do the Six Pack rods have good bolts in them? In my case, it wasn't the LY rod that was the weak link, it was the standard rod bolts not holding up. But those heavy Six Pack rods aren't ideal, either.

If the bottom end is at least solid w/ decent parts, I'd think you could build something in the 525-550 HP range that wouldn't require RPM much past say 6200-6300. For comparison, my 600-ish HP combo that pushed my junk to mid-10s was turning 6800+ at the 1/4 stripe, but I have aftermarket rods and light forged pistons to handle the stress better.

Well, I suppose that's a start...

Not lightweight pistons, new rod bolts though planning on staying around 5800 rpm .I had a GTX WITH six pack rods lightweight pistons and really go port job on 906 heads that ran 10.50s at 5800 rpm 6200 at the end of the quarter

Back in the day we ran a rebuilt stock 440-6 motor (9.8:1>single 850 carb) for 2 yrs at the track, ran a single line milodon system, first running low 11's@450hp stock, but with a big SFT cam and turning 6350 rpm@the line, then on went ported BV 906's and 10's@526hp and 6600@the line. Finally, and ONCE only we went 9.96@7300rpm@the line ...it all held up ok but I certainly didn't like the song that motor sang at those rpms. Nothing wrong with a 6pk bottom end if you have it, we had 2000gms of weight per hole turning around on that crank.

600hp out of a stock stroke 440 by 5800rpm is going be a challenge........ without building a 625hp+ high rpm type motor.

I've got a 60 over 440 with the heavy trw pistons 9.5cr good rod bolts with maybe 400 runs on the short block. It was scattered in pieces in a friends shop for years and we cleaned it up put a fresh hone on the cylinders and a new set of rods and mains just because I had them. A set of cam bearings and a 557 mopar cam that I had on the shelf. The heads are 452s with the most.efort I'll give the old junk with new Manly 2.14 and 1.81s and a new set of Comp shafts for the old set of mopar rockers. It got Comp springs and hardware and Smith's pushrods.
The old heap made 520hp and 545tq on a stingy dyno.
This was a motor that a friend of mine put together in 88 fo my Volare, a street strip motor to run on pump gas, my buddy of over thirty years was I the VA hospital in Iowa City when I found the heads for the thing and got into putting it back together. From then on every phone call or visit was about this old 440. John died on 3/9/14 before I was able to get the heads done. So on 3/915 we made about ten pulls on the dyno sorting out what this thing liked and didn't.
Sorry for the rambling,but 520 hp 545 tq

Naaa! I love this [censored]! All of sudden in my 50s I'm like a teenager again! Love to to hear the stories

Nice!

A 440? What did the car weigh? Converter? Cam? Compression?

However, you helped me get close (580-ish) to the 600 mark at just around 6000rpm with the head work and cam selection (thank you!).

Here is an old school 440 engine, built by an old fart in 1997, that made 404 HP and 483 TQ. Stock forged crank, stock rods with good bolts and 6-pack style pistons. His son and grandson dinked with heads and cams until it made 650 HP on 91 octane.

Pop's 440

LOL I used to get that alot !the converter only flashed up to like 3,500 car weight about 3800 but the guy that did our heads and are motor was a genius to
.have you ever heard of Carlin Hines out of Youngstown Ohio I don't think there was anybody better back in the day. When Ford or Chevy set a record they would send him a car and say beat that record some of his cars were honking Hemi and I know Buckeye brute took his engine there. He had I think 3 aluminum front end cars I'm pretty sure honking hemi is still racing today if you ever raced in the 80s and 90s you knew who he was in Ohio and he would not give out information about is engine work and I can send you a video clip if you don't believe it our car was called Mopar Muscle and we raced at National Trails Dragway 42 Norwalk regularly and we had that name on our car way before the magazine came out that way before that magazine came out as a matter of fact I think it was Mopar performance coverage of the 88 Mopar Nationals has a centerfold in our pictures Square in the middle of the centerfold it may even have the time and shoe polish on the windshield

Pictures won't load

There we go

Any of you guys from Ohio remember this car?
from mid 80s to the 90s

Check out my posts on page 4

What stroker kits are people going with nowadays

Old school isn’t stoked engines. Old school is stock rods, stock crank, .040 cut off 440 decks, cut 906 heads, monster cams to make up for lack of head flow, all packaged in a super stock pinion snubber chassis

I would just start with a nice set of trick flow 240 heads with what you already have. You’ll get about a 1 point bump in compression and a ton more air flow. Not sure what your current camshaft is but I would bet that it will work just fine.

Dig that. Nice B body.