427 tall deck
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Teching In
Joined: Feb 2011
Posts: 34
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From: richmond va
427 tall deck Got a chance to get a 427t needs rebuilding already 30 over. Don't know anything bout them so are they worth a damn or pass? Fwiw it will be used for a nasty BBC 4th Gen fbod swap. Thanks guys
Not much info., mine runs 9.00 @ 155 MPH in a 2700 pound 73 Z28 in Tucson. High and hot
Has Brodix heads, 6.8" Oliver rods, JE pistons 14 to 1, Comp roller cam, 4.25" Lunati crank. Don't regret building a truck block. Only inconvenience is the push rods and intake.
Al
Has Brodix heads, 6.8" Oliver rods, JE pistons 14 to 1, Comp roller cam, 4.25" Lunati crank. Don't regret building a truck block. Only inconvenience is the push rods and intake.
Al
11 Second Club
Joined: Jan 2010
Posts: 159
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From: Cranston RI
I have one with a 4.5" stroke, although it took a lot of clearancing it fits with steel rods but you could always run a shorter stroke and taller piston than you would in a normal 9.8 deck height block. It's also bored .060 over and from what I hear they can usually be bored .100 over maybe even a little more but they recomend sonic checking them once you get over .080. They are definetly worthwhile blocks if the price is right. I know its possible to get one into a fourth gen, but space is very limited. If you are looking for pictures I know there has been at least one that I know of on this forum.
4.25 stroke & +.060 is a easier setup for 496" but why? even if the block is free, you will still have a lot of money in a motor to get 496" when you can just start with a used merlin or whatever and build a 540 short deck for about the same money when you factor in the odd ball tall deck intake and longer rods.
That said, I have a 427 Truck block, 8.5 CR, 454 blower pistons, 14-71 blower, mild solid roller = 702 rwhp on 87 octane
If I had to do it over, I would find an ebay 4.5 bore block and build a 540 or 555...
yes, I know 702 rwhp isn't that great for a 500" motor, but it was at 17% under drive, 30 degrees timing, 11.0 AFR and only turning about 6600 rpm
also, with the tall deck, most headers aren't going to fit right.
That said, I have a 427 Truck block, 8.5 CR, 454 blower pistons, 14-71 blower, mild solid roller = 702 rwhp on 87 octane
If I had to do it over, I would find an ebay 4.5 bore block and build a 540 or 555...
yes, I know 702 rwhp isn't that great for a 500" motor, but it was at 17% under drive, 30 degrees timing, 11.0 AFR and only turning about 6600 rpm
also, with the tall deck, most headers aren't going to fit right.
I have one sitting on an engine stand ready to be started...I just kept it mostly stock with stock pistons and rods stock is a tq monster and its going in a 4x4 truck. BUT I think if I were to do it again I would have went with a standard deck just because the intake, alt bracket is a little different, pushrods, fitting issues etc. Good luck.
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I'm not sure it would be worth $400. Not with all the trouble of getting a tall deck intake, distributor, pushrods, headers, etc........You can find a standard height block and not spend the extra money on the tall stuff.
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Teching In
Joined: Oct 2009
Posts: 33
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From: lititz pa
You would need a tall deck intake, they do make intake spacers be able to use a std. deck intake. Most of the good TD intakes have the hole thru the intake for the dist. machined so that the distributor fits without the need for a dist. with an adjustable collar. Most cases you need pushrods to match your cam,true of any build. I used a hooker header for an early 70s camaro on my 77 camaro, 2" primarys they fit tight but wasn't a big deal,this was a 496" tall deck motor,went hi 9s in a 3700 # camaro ,just the way it went down the street. The tall deck makes it real nice to get a long rod in.I used a 6.535" h-beam scat rod. I used an SRP piston meant for a stock length rod (6.135) and a 4.250 stroke in a std. deck block. The only reason I pulled this motor was to go a lot quicker N/A. Had the same shop build me a 565"BBC
