The stock bore was 4.125". The bore of a 406 would be 4.155"
.030
no you cannot. most engines .06 overbore is usually the safe limit. on a 350 .06 only gives you 10 more cubic inch. to get to 400 you would need to bore and stroke it. which gets very expensive. youd be better off looking for a 400 from a donor vehicle.
BORE is 3.740 and the stroke is 3.480
Bore 4.250" Stroke 4.00"
4 inch bore, 3.5 inch stroke.
4.312 bore x 3.50 stroke.
4.00 bore 3.48 stroke
The bore would be 4.310" and the stroke is 4.00"
it is a 30 over 350
bore 3.497 stroke 3.81
4 inch bore. 2.87 inch stroke.