Easiest way to tell 440 RV Motor apart from industial 361 or 413?

[thequickster]

Im going to look at a 1972 Pace Arrow motorhome that the owner says has a 440 and 727 in it and I recently heard that many came with an industrial 361 or 413 and that they may look very similar. I am a novice at this and wanted to know if there was any obvious ways to tell the difference and make sure its a 440 im looking at.
thanks for any advice-Thequickster

 

[69Runner]

For an RB block look for the stamp pad just forward of the valley pan. It will have 440 or 413 stamped in it, probably under a layer of grease. 383 will be stamped on passenger side of block behind the alt. 361 being a B is probably the same as 383, and definitely will not have the pad on top like the 440.

 

[Kern Dog]

In many cases, the heads on the "industrial" blocks are unique. The exhaust ports are not at 90 degrees to the floor as with all other B/RB heads, they are angled.

 

[HT413]

Definitely look for that id pad toward the front of the motor. Some are stamped really faintly, so clean the pad up and look close!

 

[thequickster]

Thanks for all the help ill make sure to look and see what exactly it is...... really hoping its actually a 440

 

[BeatersRus]

yes you dont want the 413 so make sure to bring something to clean off that pad and a good flashlight.
altho the hicomp 413 i had in the travco was cool,it still wasnt a 440.

reminds me,for you guys ganking big blocks from motorhomes,
the dodge Travcos/late 60-s are still highly prized and sell for good coin.
the travco was a fiberglass body.

 

[Bruzilla]

If it turns out to be a 413, make a drive over here to Florida. We're tripping over motorhome 440s right now.

 

[furyus]

Look on the side of the block. Should be cast into the block. At least it is for passenger cars. Remember, if it is a short tail shaft trans, it's no good for a car.

 

[Kern Dog]

Look on the side of the block. Should be cast into the block. At least it is for passenger cars. Remember, if it is a short tail shaft trans, it's no good for a car.

But....It is good for 4wd trucks and for shorty Gear Vendors applications!

 

[glassman]

On the motorhome and truck blocks, there are a couple of extra bumps in the casting above the bell housing and below the heads. Nothing wrong with the 413 blocks. That's what a lot of the max wedge racers are using because of it's strength.

 

[thequickster]

thanks for all the info , I go look at it tomorrow and will be sure to check everything out, ill let yall know what happens