Originally Posted by chucks70nova
BBC Tall Deck 10.2 Vs. Short Deck 9.8.
What is the Good Vs. Bad of a Tall Deck 10.2 to a Short Deck 9.8 Block?
I want to Build a 427 Tall Deck 10.2 BBC for Street and Strip.
I want to know when Building this what the Good to Bad of a Tall Deck?
What should I watch for when Boring and going to New Piston Selection and Rod Length?
I've heard can make a 496 out of this Tall Deck, but would like to
know the Good and Bad before i do so.
All Help is Greatly Appreciated,
You can build a 496 ci using a short deck, (9.800") BBC.
4.250" stroke, 4.310" bore, using 6.535" rods (.400" long), (this rod will give you a 1.54 rod to stroke ratio, stock ratio is 1.53) and use a piston with a compression distance of 1.120".
This gives you 9.78" (crank center line to top of piston), (stroke/2+rod length+compression distance). Machine the deck surface .015", (give you a nice flat, straight, clean surface), will gives a .005" deck clearance.
Put a good set of heads on it and you will be happy. You won't have much trouble with engine to chassis and body clearance either.
A 4.250" stroke will need a small amount of clearance work for the stroke and added rod length, but not hard to do. I have seen some stock BBC that will take a 4.250" stroke with out clearance work.
You can find short deck BBC everywhere, tall decks are harder to find and usually cost more.
just what I would do,
gyrogearloose