What is the difference from a 427 tall deck block and a 454 tall deck?

I don't believe there ever were any 454 tall deck blocks made. As far as I know, the tall deck was made only in 427 and 366.

Yes heres two casting numbers here for 454.

14044807...454T............Bowtie, MkIV, Tall deck, 4.25" bore or 4.500" bores
14096859...502.............Gen.V, HO
24502504...454.............Bowtie, Gen.V, Race prep, 9.8 "short" deck height
24502506...454T............Bowtie, Gen.V, Race prep, 10.2 "tall" deck height

There a guy that has a brand spankin new gen v 427 tall deck for sale, was thinkin about switchin from my 454 std deck and strokin this one out.

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I don't consider the bowtie stuff a stock block.
They are made for racing, and would not really be considered a 454" block in my book.

I used the 427" TD years ago, and loved them.
They were very popular in this area so you can use a 400 rod, longer stroke, or both.

We were just discussing these blocks a week or two ago, and they are decent up to 100 over.
After that, they can be a little inconsistent, and too weak to run hard.

Good luck with the gen v stuff.

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The Gen 5 stuff can be a pain with it's squirreley coolant holes. Be aware that choices of crankshafts will be limited, that block uses a 1-piece rear main seal. You'll also get all the fun that comes with installing a tall deck (headers, hood, etc.).
A lot of the new 427TD blocks I've seen on the market are "seconds" with screw-ups somewhere that caused 'em to fail factory inspection.
Why not stroke what you have?

Now can i use heads from a std deck and mount them on a tall deck block? I want to use the tall deck for use of longer rods and more room to play with.

You should be able to use your heads, but will need a different intake.

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Heads are the same, the TD intake or spacers are required.
If you use a spacer, then you need a specific dist also.
My last couple of intakes used a standard dist, which was nice.

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Heads are the same, the TD intake or spacers are required.
If you use a spacer, then you need a specific dist also.
My last couple of intakes used a standard dist, which was nice.

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I have an adjustable Collar MSD on mine. Wasnt too bad to get set up.

well if you build a tall deck for a blower i have a nice 8:71 blower tall deck intake manifold for you :)

I will keep that in mind i have a fuel injection set up but its for a std deck block. I going to see if edelbrock makes a manifold so ill just swap the injection rails to that one.

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I also have a single dominator intake for a TD for sale. I switched all mine to tunnel ram, so I will never use it again.
I bought it new, and had it ported & gasket matched. It's the good edelbrock with nitrous or injection bungs.
The picture was before I had it media blasted.

http://www.jblandsondragracing.com/talldeckEdelbrockside.jpg


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Dang the heads im using are oval port.