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Which 460 motor is better to build ? 70s or 80s

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Old 12-07-2017, 12:35 AM
1972fordhighboy2 1972fordhighboy2 is offline
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Which 460 motor is better to build ? 70s or 80s

Hi there I own a 85 f250 with 460 . It is feedback carburetor and electric fuel pump. I want to build a 460 for off-road use . So basically aluminum intake cam , msd ignition. Nothing too crazy. (Backed up by a manual valve body c6. ) So my question is, should I build the 460 that's in my truck? Or source a 70s one from a land yacht ? Which one is better
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Old 12-07-2017, 06:05 AM
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Build the one you have. You already know what you have and have been driving it correct? By the way, you do not have what is known as a feedback carb that uses a computer. Your truck has the hot fuel handling package with the electric pumps.
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Old 12-07-2017, 12:47 PM
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cadunkle cadunkle is offline
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A couple main considerations...

Internal vs external balance:
The 460 went to external balance around '79. External balance engines have a 3Y marking on the crank and will have a weight off the side of the spacer behind the balancer. Early internal balance engines have a 2Y marking on the crank and a smooth sleeve for a spacer with no offset weight for imbalance.
This is an important consideration for transmission selection for available off the shelf flywheels such as ZF5 that were only offered for externally balanced engines. Yes you can have one zero balanced but it's extra time and money.

Early vs late blocks:
Early blocks have more meat around the main caps and can be machined for 4 bolt mains, late blocks ('79 and up) cannot work for 4 bolt mains.
Early blocks have a 3.100" deck height, '79 and up is 3.122".
Late blocks will accomodate most stroker cranks as a drop in with no clearancing. Early blocks will need clearancing for most stroker cranks.

Heads:
'72 heads are terrible for several reasons, never ever use them. Straight to the scrap pile for D2VE heads.
D3VE heads are what you'll find on most 70s and early 80s engines, these heads are large chamber with pedestal rockers and crappy exhaust ports. It doesn't take much to clean up the exhaust ports. Always port them, even if you just remove the smog bumps, smooth out the casting flash, roughness and irregularities. You can't screw these up if you don't go wild and have done any research into porting this style head. The factory exhaust ports are terrible and anything you can do will help.
E6TE heads are effectively identical to D3VE heads so far as I can tell.
D0VE heads have small chambers (around 75cc I believe) and decent ports, also stud rockers. Better max effort flow potential. You're not likely to find D0VE (or C8/C9) heads unless you're looking for them specifically.

Avoid '88 and up EFI engines. The heads suck and aren't worth building, though the bottom end is effectively the same from my understanding.

long story short, there's no advantage for your purposes (from what little you've said so far) to using an early block.
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Old 12-13-2017, 12:02 AM
Nodrama Nodrama is offline
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I built my 83 460 and added some go fast parts. 429 SCJ valves, Bored .0030 and upped the compression to 10.3:1. Howards hydraulic roller, BBC roller rocker conversion, aluminum intake, L&L headers and a 750cfm Holley Demon carb. 536 torque and 443 hp. On the dyno. I spent more than I wanted to but hope to only do it once.
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Old 12-13-2017, 01:54 PM
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Quote:
Originally Posted by cadunkle View Post
The 460 went to external balance around '79.
Block casting number:

D1VE-6015-AB or A1B or A2B = Internal Balance.

1971/73 429; 1973/78 460; some 1979 460.
---------------------------------------------------
D9TE-6015-AB = External Balance (has a weighted crank spacer).

Some 1979 460; 1980/97 460.
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