I’m stroking both of mine 4.15 x 4.31 iron head in the 66 Belvedere and 4.5 x 4.56 aluminum head in the 64 Savoy, both with 12.5 pistons. If I have to put 15 gallons of race fuel in them to go to the Queen so what, a dang meal for the wife and I is an easy $50 now and the smell of race gas is so sweet.

No. It's the whole package. He says it is a purely street car, not a race car. But inevitably, he will be rolling down the freeway at 70 and some other hot car is going to pull up along side and floor it. He will be a lot less likely to be embarrassed if he has 650 horse under the hood than 450. And it is a whole lot easier and better street mannered to make 650 horse with the extra stroke.

Yes. Mine is purely street not race.

I really don't care if I win or lose in a situation like this. The car is more a bucket list to own for me than anything combined with a nice cruiser. I can smash every one in a great while just for grins. NOT something for street creds or bragging rights in any way shape or form

Im probably at least a year away, maybe more for giving this real serious thoughts on how to actually build ,,,or not.


I truly understand the desire to go that route. But Im simply not the kid I used to be that wanted a top level fast car like that.

That said, If I pull it down and happen to find a crank issue . Then I will give some serious thoughts to build it with a little more ummmmph

Daily drove a '69 Hemi Roadrunner for several years. Small cam, headers, electronic ignition. Super Track Pack 4-speed car. I never felt like it was lacking for power. Just a strong, cool cruising machine. Wish I still had it.

I'm sorry Joel, I apologize. I took this the wrong way the other day but I understand what you're saying and agree.

No replacement for cubic displacement.

Can’t be sure what age I was when I first heard that
but probably before age 10.

Great love of stroke shines through in this thread.

No love of the wonder of nitrous has popped up -yet.

How engines work is nearly magic,
and the closer you look at little details the more “wow, that’s amazing” moments happen.

Another thing that comes out is the “winter dreaming” of what future tinkering one might do.

Ok, question.

On these large stroker engines are headers a requirement
What about head work or cam profile , stock intake and carb setups etc etc
Torque conv upgrades, rear axle ?

( mine is an auto with about a 2800/3000 stall and 3.54 dana )

I'll be honest, Im not a big fan of the convertor , IMO takes far too much throttle to get it moving, especially cold.

And more torque from more inches will only make the converter seem more sluggish on the street.

I fought this issue on my 540. It was just too 'mushy' below 3,500. I wanted a snappier, crisper response at low engine speeds. Like when I was cruising and driving around town. I tried PTC twice, but I wasn't happy with the results. I ended up sending it to UCC, back when Lenny was still there. He opened the converter, called me and said there wasn't anything else off the shelf he could do to tighten it up any more.

BUT! He had a couple of tweeks he could make and had some suggestions for me to do on my end. Now that helped a noticeable amount. The car moves off better and is almost as crisp and responsive as stock. And it cost less than $350. Lenny's the man! Or was the man, anyway.

Andy did it. I thought there was a magazine article somewhere for it. Found a thread on FABO.


https://www.forabodiesonly.com/mopar/threads/sniper-on-a-big-block-stroker.409379/

I have a stoke bore with a 4.15" crank. From what I remember the cost of the rotating assembly for the 4.15" stroke was the same as the stock 3.75" stroke. I was also told that a stock stroke 426 would have less low end torque than the 440 I was replacing it with. I went with the 472 instead of the 528 because the 528 required a siamesed block and I didn't want to give up any cooling capacity for hot days.

We did 1 3/4" headers and they work fine on my 505. I also use a 2800 rated 11" stall converter that works great with a 3.54 gear.

You really should have some type of head work done to take advantage of the larger stroke. I tried using an 8 3/4 and broke it in short order. Put a Dana or 9" in and never look back.