my wish of dropin a zz572/720R 720hp at 6250rpms and 685ft,lbs at 4500rpms .

bolted to a richmond six speed and a 9inch rear running 4.11 gears

the blower shops 8-71 blower and 2 race demon 750cfm carbs.


these are just a few basic items that I would love to putt into a 3rd gen. the only problem I have is I have never done a bbc into a 3rd gen, the only vehicle I have had the pleasure of installing a bbc into was a 69 chevy pickup, and that was a little over 10 years ago( before marrige to my wife). and ive sold my first 86 ta that was a striped down stockcar that I rebuilt to use as a street racer.

before I actually jump in over my head on this, has anyone installed a 572 big block into any vehicle? were you happy?
how much of the old school engine parts inter change with the newer blocks?

also any info on the new engine managment stuff? what has worked or not worked for you?

thanks for any info .

 

One thing to keep in mind about the 572 that makes it different from a regular big block (396-454) is that its a tall deck motor. I'm sure that will cause all sorts of "entertainment" for you

 

yep I would hope so. lol.

I first saw one months ago on TV, it was trucks on spiketv. and stacy david putt one in a 67 chevy pickup he restored from the ground up and called it "copperhead".

I watched the final episode where he test drove the truck on an oval race track, running open headers, all I could think was . SOME HOW ,SOME WAY, I'M GOING TO GET ME ONE OF THOSE!!

 

I think what he means is a zz572 takes up more space making it more difficult to fit in the engine bay and route exhaust in a 3rd gen.

Another thing you may want to consider is that the engine alone is going to be worth 3 times as much as the car. Then there's everything else needed to make it work with a 3rd gen. Lots of money. I would seriously consider whether or not you really want to invest tons of money in to a 3rd gen or use a car with more intrinsic value and/or stronger platform such as a Chevelle or El Camino. Personally, if I did it all over again I would have began with a different car. I would have saved money on the front side and lost less on the back side - that is when I sell... and we all sell eventually. But whatever you try, best of luck and enjoy!

QwkTrip

 

Darn! I was going to also say that's a talldeck block.

If you have enough money to spend, you can make anything fit. My 540 is a shortdeck but I have raised exhaust port heads which makes trying to fit headers on really fun. Add to that a tall deck and any aftermarket headers won't fit. My guess would be $1500 just for custom headers.

A 540 is the typical largest engine in the short deck family. Using an aftermarket block such as Dart or Merlin that allows a maximum overbore of .125 and still has thick cylinder walls makes the engine 4.625" bore with a 4.25 stroke which builds a 572. Normally an overbore only goes to 4.600 so that would only make a 565. 555 engines are also popular.

Changing the bore size in my engine in DD2000 from a 540 to a 572 doesn't change the torque or HP curve very much. It gives a bit more power in the lower rpm range.

Because I use 1/4" longer rods in my engine to help the rod ratio, the piston pin is in the oil ring groove. The oil rings have a support ring. A tall deck block using the 1/4" longer rods won't have this problem. Tall decks have a .400" longer cylinder.

The ultimate tall deck engine uses a 4.600" bore and a 4.75" stroke to make a 632. Anything bigger than that and you're into mega blocks (super talldecks). Designed for tube chassis or dragster only because of the size.

 

1 more thing I'm suprised nobody has mentioned yet, you could invest half the asking price of that monster into a standard deck BBC and make more hp/tq with no fitment issues that you will run into with the GM overpriced motor.

 

Ya. When I was first looking at a BBC, I priced out a 502/502. For what they wanted, I built a 468 for half the cost and had more HP. I could have built a 502/502 with aftermarket parts for less than what GM wanted for one.

If you want a big engine, there's better choices than the GM crate engine. Companies like Shafiroff, Sonnys, Reher-Morrison can make a high performance, pump gas, street engine for the same or less money and you'll have a quality name backing up the engine.

The only reason you don't hear a lot of these other names on TV is that they're not paying a show to push they're product. They don't have to.

The big GM crate engines are good up to a point. They're mostly used for racing in classes that only allow crate engines or have some other restrictions that won't allow other race engines. Ford and Dodge also offer big crate engines. 426 hemi is small compared to what they offer now.

 

I found an article on the zz572/620 in a Popular Hot Rodding magazine.

Bore 4.560
Stroke 5.375 (non standard size but probably works well in a tall deck block with the longer rods)
9.6:1 compression
Hydraulic roller cam 254/264 @ .050, .632 lift
91+ pump gas

Dyno results from the test got 701 hp at 5800 rpm and 711 pounds of torque at 4600.