427's and 454's
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 3,193
Likes: 0
From: Pittsburgh PA
427's and 454's
First off, what is a "tall deck" 427? Someone has two 4-bolt 427 blocks for sale, and that's what they are. He also has steel cranks, oval port heads, roller cam and lifters, pushrods,etc. and a complete running 2-bolt 454, all for $1,500. He said the 454 burns oil, so it probably has to be bored out. What do you guys think?
Thanks,
Jerry
Thanks,
Jerry
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: 427's and 454's (jerryjfunk)
Personally I would stay away from tall deck motors. The reason they are tall deck motors is because the piston in the motor has 4 rings instead of three. If the 454 smokes it doesn't mean that it needs bored out, maybe just new rings. I would go with the 454 and stay away from the tall decks.
Drifting
Joined: Oct 2000
Posts: 1,825
Likes: 56
From: Shawano WI
Re: 427's and 454's (jerryjfunk)
Tall deck refers to the distance from the centerline of the crankshaft to the surface the heads bolt on to. A standard height big block is 9.800. A tall deck block is 10.200 which allows for either a longer stroke crankshaft or longer connecting rods. Tall deck blocks will require either intake spacers or a intake manifold specific for a tall deck.
Drifting
Joined: Oct 2000
Posts: 1,825
Likes: 56
From: Shawano WI
Re: 427's and 454's (jerryjfunk)
Unless you want to make a lot of cubic inches there is no need to go to a tall deck. It can cause problems fitting into a corvette but nothing that can't be overcome. Because it is .400 taller it can cause hood problem and clearence problems around the brake booster. As the block gets taller it speads the heads farther apart which can cause problems with exhaust and headers. Again these are all problems that can be overcome but take extra time and money.
Drifting
Joined: Oct 2000
Posts: 1,825
Likes: 56
From: Shawano WI
Re: 427's and 454's (smonska)
That would leave the deck fairly thin and could lead to head gasket sealing problems. Also some of the early tall deck blocks did not have blind head bolt holes so that would leave .400 less material for the head bolts to hold to which could cause them to pull out.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: 427's and 454's (SBR)
The tall deck motors were used in heavy duty trucks but not in pick ups. Because they can accomodate a longer stroke than standard blocks, they've been popular with the "mega cube" builders. As already posted, their increased height and width prevent them from being used in Vettes without some serious mods.
Safety Car
Joined: Oct 1999
Posts: 4,101
Likes: 10
From: NorCal
Re: 427's and 454's (jerryjfunk)
Let me get this straight. he wants to sell ALL of it for $1500.00? Seems you could sell all the stuff you don't need and end up with a pretty inexpensive 454. Just depends if you want to do the swap meet or E-bay thing...
Hans
Hans
Instructor
Joined: Nov 2001
Posts: 111
Likes: 0
From: St. Paul MN
Re: 427's and 454's (Pete79L82)
Tall deck refers to the distance from the centerline of the crankshaft to the surface the heads bolt on to. A standard height big block is 9.800. A tall deck block is 10.200 which allows for either a longer stroke crankshaft or longer connecting rods. Tall deck blocks will require either intake spacers or a intake manifold specific for a tall deck.
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 3,193
Likes: 0
From: Pittsburgh PA
Re: 427's and 454's (Wrencher)
But the question is, is there a market for tall deck 427 blocks...? There's only one on Ebay right now, and it has no bids. I know it would be a good deal if I had the time and money to build both of the 427's and sell them, then use that to pay for performance parts for the 454... but I don't have the extra cash and not much time, either. I really don't know what to do.
Jerry
Jerry
Instructor
Joined: Nov 2001
Posts: 111
Likes: 0
From: St. Paul MN
Re: 427's and 454's (jerryjfunk)
But the question is, is there a market for tall deck 427 blocks...? There's only one on Ebay right now, and it has no bids. I know it would be a good deal if I had the time and money to build both of the 427's and sell them, then use that to pay for performance parts for the 454... but I don't have the extra cash and not much time, either. I really don't know what to do.
Jerry
Jerry
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: 427's and 454's (jerryjfunk)
True, true... how much generally do they go for?
Thread Starter
Melting Slicks
Joined: Mar 2002
Posts: 3,193
Likes: 0
From: Pittsburgh PA
Re: 427's and 454's (Flareside)
So theoretically I'd have a $500 running/smoking 454. Maybe he'll take $1,300... Well, I'll give it a try, seems like it would be worth it. Even if I didn't use the 454, I could rebuild it and sell it to make some money for my 350. :D
Jerry
Jerry