Dyno,
If I remember correctly, you and I are both slightly over-carbed running 850 holley's on 461's. Combine that with the heavy weight of a Sonic (or in my case a Formula) and a single plain manifold, I think it just wouldn't have the midrange. If I'm not mistaken, can't you more easily get away with a large carb on a dual plane than a single plane?

5200rpm's ? That's where thier just starting to run good

I was under the impression you would be spinning it higher. That is why I thought the single plane would be better than the dual.

On my version of Dynos 454 on roids I ran a match ported oval port Holley Strip Dominator manifold with a 750 DP. The boat ran awesome from 1500 to 5400 RPM. Smaller boat though.

that motor was in a 25 checkmate with a single roller 502...I'll be using flat tappet cams.

dyno, did you find more oil in the bilge? Remember, Simple Green works wonders....

I was on dyno's boat this past weekend, it does run strong - very nice!

Mike the Bilge looks like hell it may take all summer to get all the oil out....simple green and a wet dry vac!

Just get the Mrs down there with a big bunch of towels! Tell her you'd do it, but you don't fit; since she's so nice and skinny, she should have no problem slipping right in there!

I tried that on my wife once, and I've still got the scars....

OK back to the subject....should I have the mains doweled before its line bored? whats that cost????what other mods should be done to the block to make this thing BULLET PROOF!!!

I've found Callies Dragon slayer Cranks and rods the cranks run $810 and the rods are $499 anyone know where I can get a better deal???

If you have 4-bolt mains and you are keeping pump gas compression with maximum RPM at or below 5500, you certainly don't need the mains doweled. I think my engine builder charges around $225 to install the dowell tubes and align bore. If your blocks have 2-bolt mains it is highly recommended you get them doweled especially before stroking.