Tigger,
When I removed the starter off my mom's Cadillac the trans line were in the way on her motor a, 5.7 V8.
A Chevy mechanic friend advised that after you pull the bolts out and disconnect the wiring turn the starter into a vertical position and it may clear the trans lines and drop straight down. The trans lines on mom's car bulged out slightly toward the front of the starter and that was the clearance needed to get the starter down while it was in a vertical position - but in a horizontal position there is no way the starter would drop straight down.
This might work on your car - but I'm not sure.
Good Luck.
Harryface
05 Park Avenue 36,055
91 Bonneville LE 306,123