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Re: What mopar engine and trans for average street rod?
[Re: wayfarer]
#192722
02/17/09 12:22 AM
02/17/09 12:22 AM
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Joined: Jan 2003
Posts: 8,089
Sorrento, BC, Canada
4speeds4me
master
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master
Joined: Jan 2003
Posts: 8,089
Sorrento, BC, Canada
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Quote:
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a poly 318 would make you way cooler on cruise night!!!
They ARE a cool engine but .... parts are ruff to get PLUS they are a bigger, heavier and wider engine than a 318/340/360.
Some parts are a bit harder to locate but all parts are available. Bigger? same short block different style head that only looks bigger; heavier? maybe 30lbs due to the heads and intake; wider? looks are deceiving.
The 62-66 short block is essentially the same as post 66. And yes, you can use the stroker cranks in them!!
These engines are bullet proof. Many times they are very cheap if not free just because they look different.
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Ummm...no. The Poly block is wider than the LA block. Otherwise there would be nothing to stop you from bolting a set of LA heads on and slide in an LA cam, and go. Bolt a set of LA heads to a poly 318 and try to bolt the LA intake on...you'll find it doesn't come anywhere near bolting up to the heads. While the cranks will interchange, and the rods, and a few other odds and ends, that's where it ends. They don't call them "Y" blocks for nothing.
2 Demons...no, not my kids! 
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Re: What mopar engine and trans for average street rod?
[Re: rabid scott]
#192725
02/18/09 02:08 AM
02/18/09 02:08 AM
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Joined: Jan 2003
Posts: 8,089
Sorrento, BC, Canada
4speeds4me
master
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master
Joined: Jan 2003
Posts: 8,089
Sorrento, BC, Canada
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Quote:
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They don't call them "Y" blocks for nothing.
The Y-block is a Ford engine. 
http://en.wikipedia.org/wiki/Ford_Y-block_engine
Yeah, I know that there is an official "Y" block made by Ford. However, more than one Mopar rag back in the 80's, as well as one of my old Mopar Engines books referred to them as Y block due to the wider spread of the V. That's pretty much how they look bare. Regardless, the fact remains that the block IS different, and NOT interchangeable or substitutable for an LA piece.
2 Demons...no, not my kids!
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Re: What mopar engine and trans for average street rod?
[Re: 4speeds4me]
#192726
02/18/09 01:00 PM
02/18/09 01:00 PM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
"You're Where?"
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"You're Where?"
Joined: Aug 2006
Posts: 1,884
Tracy CA
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Quote:
...more than one Mopar rag back in the 80's, as well as one of my old Mopar Engines books referred to them as Y block due to the wider spread of the V...
By that definition then the B/RB engines are also "Y-blocks" as well because of the location of the crank up in the block, up and away from the oil pan mounting rails.
We have totally hijacked this thread.... 
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Re: What mopar engine and trans for average street rod?
[Re: rabid scott]
#192727
02/18/09 07:14 PM
02/18/09 07:14 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Yes, big block Mopars are Y-blocks. Doesn't have anything to do with the spread of the V (which is 90 degrees for any even-fire V-8). Has to do with the block extending below the centerline of the crank (i.e., the lower leg of the "Y"). A poly 318 block ends at the crank centerline, just like a wedge 318. As for swapping LA heads onto an A engine, I've never done it myself, but apparently some have: https://board.moparts.org/ubbthreads/show...p;vc=1&nt=2Also, poly 318 heads flow better than 318 wedge heads: https://board.moparts.org/ubbthreads/show...rue#Post4565497(Be sure to read all the posts in the links above.) Here's a pic of a T-bucket with a poly 318 I pulled off the internet a while back: 
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