Agreed!
It's gotta drive engine builders nuts when customers (with all good intentions and just trying to be educated) come in and say "so and so on such and such website says these are the parts I need to be using".
Kind of like going to the doctor and telling them what's weong with you because you read up on "web-MD.com".

My comments aren't directed at you monster, just a general observation.

Hahaha I never thought about that! Makes perfect sense! I am going to let Ray handle it. I just like learning and asking questions. Thank you guys for the help. If I could get a doctorate in "fast boats" I would be in college yesterday.

Educating yourself is excellent. But, your engine builder is the expert. Also, specific HP goals can be achieved through different recipes. And your builder might have one that he is comfortable with and has a track record with it.

Isn't this fun. Lol... This is the kind of stuff that can keep you awake at night. Just curious what gm castings you have currently. Most that I've seen are pretty much done at .600 lift/320 cfm so that alone would limit your cam amd combo options which ultimately wouldn't get you where you would like to be. You have some good input from others who have been there and done that so to speak. Gm heads in the right hands can still make some power however would be costly. Even your good aftermarket heads have much to be gained with porting and bowl work. CNC heads would be your best bet however a little pricier. 320cc Pro filer heads is what I would look into at an affordable price and flow well out if the box and can get some pretty good gains with little work.

Sounds like you wanna NA build but if you strapped a 420 mega blower on you'd be able to use both your heads and cams and achieve over and above your hp goals for probably the least amount of money. Seen several low hour used ones go very affordable over the last few months.

Just an option I'm sure you've kicked around.

Absolutely! It's fun to learn and good to gather as much info as you can going in.

Like using the highly recommended. Bob M? What a HUGE mistake tht was for me...

Buy heads bare have them built, I would really do some talking on cams that's for sure, ERSON ground great cams for my old engines... Wish I contacted them with current ones...700 hp with efi gonna be very tough it at all possible, I may be wrong though

MER recently built a 555ci. Solid roller, 10:1ish, dominator, made 720ish HP with the "custom" spec'd cam from the cam god. Yanked that cam out for a cam he had laying on the shelf he got from howards years ago, that looked like a better fit for the combo. Ended up at 770ish hp. Did lose a smidge of midrange torque, but nothing major. Definitley worth the HP gain.

What kind of rpm I wonder with said cams at hp you stated. That would be interesting to know.
Tks
John
Btw what shiney 4 blades you running?

That BB1 head is a bad azz head Brodix doesn't advertise it much because the CNC porting is proprietary and is not done in house they have to send the castings to STS for the porting...

I wanna say around 6400. This was a jesel valvetrain setup , engines going in a 33 fountain with speedmasters.

You see me this weekend ? I was up in Grand Haven