I would really recommend getting an accurate weight from a public scale. My 66 F100 with 390/c6 and only mods of front and rear sway bars with 10 gallons of fuel plus 175lb driver is 4200 ;bs. the obvious of 1000lbs extra will make a determination in your choice of parts. I have had 4.11,3.50 gears and in my opinion if your just in the city would be go with the bigger gear. I would get a mechanical advanced dist. and dial it in..the vac secondary just always lags a little, but I'm not a carb tuner.
Had a 270h cam and it pulled good but swapped out for a custom cam for my set up. Stock heads and valve size with just enough polishing on the intake and exhaust runners to remove the rough and nothing in the bowls. The custom cam was night and day difference and the cost was negligible. I would use a performer rpm or a port a sonic manifold.. the only difference by the seat of you pants is a lot more top end..but both do great up to your 5000rpm.. after the headers I would definitely recommend a larger exhaust pipe of 3"  it sounds great and much better performance than the 2" most muffler shops put on
my f100 is just a 390 + .30 c/6 and 4.11 gears and it's a monster on the street stop light to stop light plus the added bonus I towed a 12,000 lb trailer behind it 2000+ miles from the Midwest through the rockies and it never flinched and when I dropped the hammer it would out accelerate traffic to merge onto the highways.
I guess the point is match all your parts and you won't be disappointed

So... if they would make a kit for a turbo 400 look like a C6, would it be a tranny tranny?

That's awesome

So who was closest on this one ?

That would put water in the oil, but not oil in the water. For oil to get in the water, it has to be a place where oil pressure will overcome the pressure of the cooling system. There are only a couple areas where that typically happens.

Thanks for pointing that out..I have always seen it the other way around with coolant in the oil. Good to know about this, never would have thought of those oil passages failing

awesome 

545hp/560tq

Nice ..Poly Maroon paint ?  I would be interested in the replies ..one of these days I need to get a new headliner in my 66 galaxie.. I'm waiting for my rich aunt to get out of the poor house so I can afford it