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Pat do you have any experience with the hyd. roller cams?I have a customer that wants to use one in a bracket car.Lunati claims this cam will go to 7,200 with no problems.What are your thoughts on...

No need to be sorry.
Last night I was so mixed up on the Mark IV or Mark V block thing.
To many numbers.

The reason I asked was that seems like a lot of lift for that amount of duration.Are you running a 1.8 rocker?

Will this engine have a std. style head on it or something like an 18* ''BIG CHIEF"?

How thick does this make the piston deck?

One thing to consider is the piston availabilty is much better with the 496.

When I use to bracket race I had a 468 with a 2-bolt main and an ARP stud kit.I shifted at 6,600.Every winter when I would pull it down to re-ring it the caps where still very tight.After the 3rd....

The 781's will not fit on Gen V or VI blocks.
The 920 heads will work.They come with 2.19,1.88 valves.The port volume on these heads is 325 and they to be converted to run an adjustable valve train....

O.K., now I am confused.What series is the block?

To get 500 hp out of 510 cubes this can be done with 781 heads with 2.19,1.88 valves plenty of port work,bowls blended gasket match etc,you will need 9.1 comp. ratio a cam with around 245 to 250 at...

I wish we could talk you into a low deck 496 instead.The .400 taller deck won't be a lot of fun.Hood clearance will be a head-ache and so will the exhaust.

Fair enough.Dusty I hope we did not scare you off with our different ideas.
We are ready for any and all questions.Fire away.

Well Dusty it seems we have a bit of disagreement here.
I have not gone to the strip for a few years but I have a hard time believing that there are many guys with over 500 inch blocks drag racing...

There is no way a stock head will supply enough air to an engine like this work.If he has a set of re-worked cast iron GM rec. ports it might work.It really depends on the cam.On a lower lift mech....

The 450 - 500 is very easy.The "shelf-pistons" means a piston in-stock and not-custom made.I like horsepower.I say sell your heads get some good alum. heads so you can make 600+ hp on pump gas.
Ohio...

I just got done building a 535 with the tall deck block.Bore 4.350 X stroke 4.500.The biggest problem he is having is the exhaust.With the .400 higher deck height it puts the exhaust right on his...