i have 11 inches under deck lid for block where blower will bolt is there any that will fit with out doing any cutting

An efi (axial) Whipple will certainly fit.
Eddie

my motor is a carb motor

maybe a centrifugal style with carb box?

Do yourself a favor and change it to efi . If you truly are thinking of a blower, you should already know that you are going to have to make lot's of changes anyway.

why efi

250 blower height
Manifold from block to top gasket surface = 4 1/2"
Blower with carb = 12"
Flame arrestor = 3"

A friend put a 250 blower on a 251 checkmate with a 454. It fit no problem. He blew the stock 365hp mag with the blower. Then he had a conservative blower motor built. At 6 Lbs of boost with the 250 blower he was at about 550HP. No chiller and no problems and whined like a little girl when on the boost. Sounded cool.

Do a little home work and you might figure it out

cig 20,,are you going to follow through this time??? the last guy i sent you to all you did was waste his time....if your just tire kicking then please dont waste any of our time,its not going to be a 1000 $$$ job..