Projects 416 Pontiac ?

I have a friend who has a Motorhome with a 416" Pontiac mill and he wants to install it and it's auto-tranny into a 37 Packard. Has anyone any info of this mill , I never heard of one. Second question is will it fit. I think any big mill like that could be mounted in that chassis. Thanks for any help, Hank

 

bttt

 

I've never seen a 416 or even one listed. Maybe something done by the Motor Home Manufacturer?

Maybe I'm just not aware? Either way, you can make make anything fit.

 

i ave never seen a motorhome with a factory pontiac engine in it.
I bet its a 413 dodge engine.

 

Just a guess but, perhaps the motorhome manufacturer used the horsepower rating, instead of the cubic inches? Isn't that is how Buick listed their engines?

 

Yeah, there never was a factory Pontiac engine of that size. It's possible that it's a a bored out 400, but then again unless it was a home built motor home I've never heard of one that used a Pontiac engine.

 

Buick was Wildcat 445 which was based on the torque rating.

 

Get the casting number on the block, the date code by the distributor hole, the stamped code off the front RH part of the block just below the head and the casting number off of the heads and somebody will tell you exactly what it is. Or, post a pic or two and somebody can get it pretty close from that. No factory 416 Pontiac ever left the factory. It'd take a 400 block +0.060 plus a stroke off-set or +0.085 on the bore to get that displacement. Pontiac powered GMC trucks in the late 50s, so a motorhome from that period or built on a GMC chassis wouldn't be that big of a stretch.

 

Like a '56 316?

 

additional info, It is a 1971 Atlas motorhome ,former owner says it has a Pontiac 416 v-8 . I'll bet he does'nt remember cubes correctely.

 

Ooook! How much of a stroke difference between 455 crank and a 400?? And what block could have been used to come up with a 416???

 

HANK...well whatever it is, in the world of hotroding. just about anything is possible...POP.

 

Deuces, a 400 Pontiac has a stock bore of 4.12 and a stroke of 3.75 with 3 inch mains, while a 455 Pontiac has a bore of 4.15 and a stroke of 4.21 with 3.25 inch mains. You cannot run a stock 455 crank in a 400, and even if you had a 4.21 stroke crank in a 400 block, you would have around 455 cubic inches. Put my vote down for a 440 Mopar.

 

Owner found info on motor , it's a 413 Dodge, and it will find it's way into a Packard. Thanks to all who responded.