advice on profiler heads

hello team, I have not been on for a while due to work but now I need advice.
I have a 604 running with profiler 205 heads fitted out by TRE, victory titanium valves 2.1 install height jessel rockers etc.
the quest ion is my engine man here in Australia seems to think there is not enough valve length and I should not rev past 7000, worried about coil bind and valve float, which with a 6000 stall starts to limit things. cam lift is 800 so it is not that big in my opinion.
any thoughts would be welcome.
Series P/N: 205 C Style Big Block Ford Head Specifications


Material: Aerospace Specification, A356 Aluminum Alloy (Primary Virgin Ingot)
Valve Angle:  Standard Stock C Style
Bore Spacing: 4.900 (standard big block)
Intake Port Volume & Shape:  Oval-Shaped, PRECISION As-Cast 420cc
Intake Port Location: Raised .200" from stock location
Intake Port Flow: 524 cfm@ .900 with 2.450 valve
Combustion Chamber: Heart-Shaped As-Cast - 54cc  
Milling: .005 per cc flat milling, .007 per cc angle milling

Exhaust Port Location: Raised .200" from stock location
Valve Diameter: Intake - 2.450, Exhaust - 1.850"
Valve Length: Intake - 6.400" long (2.100 install) , Exhaust - 6.300" long (2.100 Install)
Deck Thickness: 1/2" Deck for Nitrous or Blown Applications
Spark Plugs: Revised location to improve flame travel. Use .750" Reach, Gasketed (NGK R5671A-7 or colder)
Rocker System:  Improved Solid Rocker Bar for added stability. Majority of aftermarket, (i.e. T&D and Jesel)
Valve Guides: Manganese Bronze to assist in extending valve life
Valve Spring Pocket: 1.650 OD Maxiumum (no deeper)
Valve Seats:  Copper Alloy (standard)
Engine Size: 4.60 bore size and larger

What valve spring?

1.650 triple springs

Some thing about like a PAC-1248 should let the engine do 8,000 or better.....with a ti. valve.

thanks

This is assuming there is nothing weird about the cam and a decent pushrod.

Better get a visual on those parts!! Check for coil bind at max lift. How much space between coils??
Does the retainer get close to the valve guide??
Is the roller tip in danger of rolling off, or close to the edge of the valve stem??

ironbark wrote:1.650 triple springs

Brand and part #?

It would be easy enough to check the springs and measure their loads and bind height. Then you would KNOW if it is going to run out of travel or not and weather or not the spring is going to handle your cam. No big deal.