depends on the bore and stroke of the engine.
The volum of a cylinder is: ∏r²*h
Aermacchi 350= 344
bore: 74mm
stroke: 80mm
radius (bore/2): 74/2=37
3,14...*37mm^2*80mm=344 067/1000 = 344
now reverse it:
396*1000/80mm/3,14...= √1575,63...= 39,694...*2 = 79,388mm
To make an Aermacchi Sprint a 396 you would have to bore out from 74mm to 79,4mm.
Now do the maths on your own engine.
Multi-cylinders? multiply number with cylinder-count (344 067/1000*4) and divide next (396*1000/4= 99000/80 etc
S.
The Bore of a 350 cid engine is 4.00, the stroke is 3.48 inch..
4"
No more then 0.060 and then it starts trying to RUN HOT on you.
Primarily the bore size. The 305 has a bore of 3.74 and the 350 is a 4.0 bore. They share the same stroke on the crank. And no, you can't bore a 305 to a 4.0 bore.
Its not a matter of how little you can but how much, i would prolly say to be safe 70 or 80. If you bore to much out , the engine will run to hot, thus you need to be very careful and know what you are doing.
A 383 is a 350 block with a 400 crank. The block is bored to 4.030". A 400 has a 4.125" bore, so you'd need to bore the 383 roughly .095", which is probably not practical as the 350 is not made to be overbored that much.
Chevy didn't make a 350 engine in 2001
3.48 inches.
You can bore a 350 .090 over, but the thing is the bore is so big that the cylinder walls are about a hair line thickness apart. In order for the engine to accept the bore and punishment of the shear power, the 350 Block must be casted with extra carbon to strengthen the block.
350
4.040". The standard bore is 4.00".
355