Can I take a 72 industrial 413 block and bore and stroke it to a 493 or 505 wedge stroker?

thanks Kurtis

You could put a stroker crank in there but you can't bore it out far enough to take off the shelf pistons for a 440 based stroker. You would need to have custom pistons made and at that point you might as well spend the extra few hundred bucks on buying a 440 block instead.

You can safely bore those blocks to 4.25 so a 4.375 strok or a 4.400 stroke, both with BB Chevy rod journal sizes will fit, maybe not with a stock internal oil pick up on the 4.500 stroke Do the math and see what works out best

The easiest 413 stroker is the 4.15 crank-stock 413 rod-stock 383 piston standard 4.25" bore making a 472.

If you want a big inch motor a 400 or 440 block is a much easier starting point.

Now to confuse things, there was a time when Chrysler was building 413 and 426 industrial engines on the same casting. That means to me that such a casting could go out to possibly 4.31" bore. That with a 4.25" crank gets you to 496.

IMHO using a crank with stroke over 4.25 is into the diminishing returns area UNLESS you are building a period engine into a max-perf unit.

I'd say that by the time you get to 472 or 496 you need to be putting good money into heads before making the engine any bigger.

R.

I think it might be possible to use Pontiac 400/455 pistons. They are 4.125" and have less deckheight. The wristpin is smaller, so the 413 rod needs to be bushed. You need to rebalance the crank as these parts are lighter.....
I will check next time an engine comes in...

Myth and lore abounds.
It MAY BE true that they were made of sterner stuff. But I don't believe there is a clear answer for that.
I do not believe the bottom ends are any stronger than other RBs. Maybe someone can tell me with pictures.
I do know that the same casting number was used on some 413s and 426s which were produced at the same time. That tells me the blocks had enough meat for a 4.25" bore plus overbore for rebuilds. However, I believe the same foundries cast all the blocks and if they had core shift in the passenger car and light truck blocks, how would the industrial blocks differ?
Now there were blocks with waffle looking outsides and that might have been for a number of reasons including the tendency of the RBs to crack between the core plugs.

One thing to contemplate is that those industrial engines were less highly stressed than passenger car engines. Most of them had two-barrel carburetors and were rated conservatively. Compression ratios were lower. Camshafts were short duration low lift. In other words the engines were built to be bulletproof and part of the way that was accomplished was by limiting output.

R.

Sure it can be done
http://moparproshop.com/inc/sdetail/4383/4826

anybody like mancini's or I'll bet even 440 source can throw you a stroker kit may we an extra hundered for the pistons and take two weeks but what the hey. go with a 4.25 stroke

I am going the 472 rout for now it cheaper for me didn't pay a lot for the block rods and crank.

thanks.

The 361 and 413 industrial HD blocks had the reinforcing webbing on the later blocks, 1965 or 1966 era and later, and the cast in water pump bosses on the rear of the blocks.If those booses are not there it is probally the non HD version of the 413 motorhome and medium duty truck blocks In either case always have the cylinder bores soinc tested before boring