what would this be
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From: In the corner of my mind!
Car: 1989 TTA #1240
Engine: 3.8 SFI turbo
Transmission: 2004r
Axle/Gears: 3.27
if the 350 you are speaking of has the 3.48 stroke iit should come out to around 358 however unless you have a 400 block you cannot bore out a 383 40 OVER SINCE IT IS ALREADY BORED 30 over combining the 3.75 crank going .70 overbore will most likely run you into the water jacket that's why the 400 block had siamesed bores with no water jackets in between them