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Discussion Starter · #1 ·
hey guys, new to the forum but have been reading a lot of the topics here trying to learn but im really not sure what engine i would like. I recently purchased a 70 fastback and want to build up a bb to swap into it later on, from what i gather the 460s seem cheaper and easier to find but the 429s seem like more of a muscle engine vs a truck one, im probably way off on this but thats what i figured from looking at the ratings. My main goal is to get 500hp out of one, while staying relatively stock, such as D0VE heads, but possibly changing to a comp cam, edelbrock alum intake, and a 750 cfm holley or quickfuel. I have found several 429s and 460s in my area but im just not really sure which would be easier/cheaper to build up, any help is greatly appreciated, thanks.
 

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521ci. :p

Honestly, the 460 is easier when it comes to getting to some magical number like 500hp. Many ways to skin the cat, but remember no matter the engine, air flow makes the power.
Attain that air flow from many different ways: bigger cam, better heads, etc.
If you want to stay at a certain cubic inch over another, just talk it over with a builder and work out a plan. 500hp isn't a huge issue, but getting the street manners you desire with that power may require some finesse and good tuning.

Drew
 

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If you keep your hp goal the same the larger displacement engine will be lower stressed which usually translates to better street manners.

Since it is impossible to distinguish the displacement of a BBF by looking at the outside of it, it would be a no-brainer to go with the largest available engine to meet your goals.

If you wanted to use mostly stock parts and are shopping for a core, I would try to find a complete early 460 as they would have the smaller chamber heads and you would be looking at rebuilding the short block and heads, and adding cam/intake/ carb to reach your 500hp goal...

Good luck and have fun!
 

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Discussion Starter · #4 ·
Ok thanks for the responses guys i think I know what to look for now, I ran across a 78 460 but I heard those are not as good as the early ones, but if it's cheap is it worth buying and building?
 

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Thanks very much, beautiful engine btw
The budget ported heads utilized on this crate engine are worth about 70+ hp vs oem. This is the key to an efficient engine using modest cam timing and compression.



S
 

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Discussion Starter · #9 ·
Since you're new to the forum, I will tell you that The Mad Porter is one of the guys you want to listen to on here. He really knows his stuff. When I see a post by him or Rmcomprandy, I usually read it.
yeah i was checking out his website earlier lots of neat stuff on there
 

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Maximus years ago I had experience with a direct comparison between the 2 engines I installed a 1970 460 in a 73 mach1 it was a freshened stock shortblock with early heads ported on the exhaust, a crane cch-304 cam kit scj intake and hooker headers,after a mishap that broke a piston and cracked the block,I obtained a 1969 429 shortblock freshened it and installed the cam heads intake and headers from the 460 and reinstalled it in the same car with the same trans and rear gears,above 2300-2500 rpm both engines ran and pulled the same,but below that rpm were like night and day the 460 had way more low end power also the 460 had slightly better idle characteristics if that is a consideration.I think the impression of the 429 being a muscle engine is due to the fact that the large majority of them being early high compression engines only 2 years of 429 car production being low compression,while on the other hand only the first 4 years of 460 production was high compression engines while the next 25 years of 460 production was low compression.This remark of course being limited to standard level engines since most people don't get exposure to cj's,scj's,PI's, and bosses these days.
 

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Discussion Starter · #11 ·
Maximus years ago I had experience with a direct comparison between the 2 engines I installed a 1970 460 in a 73 mach1 it was a freshened stock shortblock with early heads ported on the exhaust, a crane cch-304 cam kit scj intake and hooker headers,after a mishap that broke a piston and cracked the block,I obtained a 1969 429 shortblock freshened it and installed the cam heads intake and headers from the 460 and reinstalled it in the same car with the same trans and rear gears,above 2300-2500 rpm both engines ran and pulled the same,but below that rpm were like night and day the 460 had way more low end power also the 460 had slightly better idle characteristics if that is a consideration.I think the impression of the 429 being a muscle engine is due to the fact that the large majority of them being early high compression engines only 2 years of 429 car production being low compression,while on the other hand only the first 4 years of 460 production was high compression engines while the next 25 years of 460 production was low compression.
i definitely see what you mean, many people see the 429 as more performance oriented simply because of what it was put in vs the 460
 

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Assuming good cylinder heads etc...

The thing that most do not take into account is that the larger engine will make more torque everywhere in the power band so average hp production under the curve is naturally going to be higher. Torque over time = HP = work getting done. 40 # feet of torque is something you are going to feel in the all important azz dyno.

Back in the day the 29's felt better because with limited exhaust breathing the smaller engine reved out better but did not make more power or torque. Many years ago I ran both in a 1970 thunderbird. The 460 was better everywhere.



S
 

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That link outlines most of the parts utilized when viewed on a pc or laptop. Smart phones sometimes drop the description.







Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Log into Facebook
 

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If I was looking at a 429....I'd just skip it and build a 427 Windsor. Cheaper and lighter for the same (to higher) output.

Blasphemy....I know.

Thats what I tell our Cobra replica clients.



SJ
 
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