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Discussion Starter #1
I have a 69SS with A/C and I am considering moving from a 396/325 to the crate 454/425.
Is the block the same size?
Will my current accessory brackets fit (A/C, power steering, alternator)?
What oil pan will I need?

I recall that someone replied to a similar message before and they had performed the switch on their 1969SS, but I could not find this message via "search".

Thanks.

John

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John M. Usher
Starkville, MS
1969 SS 396/325
TC#147 / ACES #3063
 

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The only difference to these engines is internal and as long as you have the same bolt bosses on the block and heads they are the same dimensionally, and your pan should bolt up with no problems. Ask the dealer you are buying it from and he will have all the answers for the swap you are looking for also. Anybody else do this swap before? There might be something I am not thinking about due to the difference in years of the engines, but I think it is a direct swap.
 

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Just did it with a 67 396/325 and a 427 ( 1973 454 block). Identical. Unbolt everything off your 396 and bolt it back on the 454. Easy, huh? Seems to me the clutch pivot was slight diff, but unbolt and bolt back on. Fortunately for me I have power nothing, so it was simple, but it's a bolt in.

[This message has been edited by Gene Chas (edited 11-01-99).]
 

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I just did this exact change in my 70.
The 454/425 is a GREAT engine. I'm very happy that I made the change.

Get the GM Performance Parts Catalog. It contains all the info you need to do the change.

1) Oil Pan Get the 4qt Kit from GM, contains everything you need including pan, oil screen pick up, bolts and instructions to remove splash shield, new dip stick and tube

2) Engine is set up for automatic. If you have a standard you MUST get a new flywheel. Can NOT use the 396 flywheel. Also, don't forget the pilot bearing!!! Change the clutch, pressure plate and throwout bearing while its apart.

3) The new Gen VI block has a boss for the clutch ball ( get a new one ) and also can use the fuel pump from the 396

4) Need to replace gear on distributor.

5) The 454 manifold is a square port model for a Holly.

As other have said, a big block is a big block. Headers, brackets etc all bolt right up.


As for price, shop around. The engine lists for $5K + but you can get it for about $4200 if you shop around. I was able to get mine at SHOP list. Some places list the engine for shop list but till you pay shipping ...
Call every Chevy dealer within driving range and ask the parts manager for a quote.

Some prices:

Part----------------List--------Net/shop
454/425---10456413--5725.-----4160
Clutch Ball-3866568--10.70------8.03
Dist Gear-10456413---33.75-----23.63
Pan Kit-----12495360--176.79----150.27
Flywheel--- 14096987--121.69-----103

If you want to talk to me directly, send me e-mail.



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Bill Taylor
TC Gold Member #73
www.chevelles.com/showroom/BillTSS70-2
www.chevelles.com/showroom/leaves2
 
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