The cam is the biggest limiting factor.

The heads aren't that bad, but if you put better
heads on it, it wont make much, if any difference
if you keep the stock cam in it.

Bulldogs need blowers! They are perfect for a huffer! Change the cam & carb that thing correctly & you have some serious HP without a huge expense.
The bulldog is a great package that should make 650 HP easy without the superchargers.

if you talk to DEAN GELLNER he could trick out that 540 with his cam/intake/carb/porting and make you 700 to 750hp:D:D

Dock hows your project going?

JaayTee 90mph Dam that is fast. The word around the lake that you was a 85 mph boat. I am the one with the red baha inlander with the number 67 on the side. I changed to m1 to m3 procharger so I could run beside you. Best speed was 83.6 at 6000rpm with 28 labbed changed to bravo 1 32. Best speed 82gps 82,8 on hand held at 5000 rpm. I hope the m3 will boost me to 85mph. Plan on testing this weekend at laker rathburn. Not bad for a 208 inlander.It sure does feel like I am going 90 plus mph

Ill be there.
 

Just completed 27 Baja with a 605 Stroker and 1390 dominator. My problems in the past have been stability and chime walking around 85. Pulled old Bennetts off and went to a 24" K plane lower on the V with New Hydro Steer and 2" lower. Let you know what happens!

The steering will tame that bad boy! Mine ran 86 GPS last year w/M3SC. That 23 ought to haul ass with an M3!!! Just put my new Lightnings on, hope to tune and get this mofo runnning 90 next week!

Slow, very slow.

how big of carb you guys thinkin? I think its a 850 on there now, would bumping it to the 950 and putting the bigger cam do it? I don't think you can go much larger than a 950 w/o getting to the dominator series...

Dominator, 1050. Jet it down.
Why not go with a dominator? They sure do make a good looking body. No choke tower either.