Sounds like a great swap. We upgraded our 351W engine to a bored/stroked 351W, getting 454cid. We achieved 660+ flywheel HP with Shell 91 pump fuel with a not crazy hydraulic roller camshaft. We built larger headers as well to accommodate the increase in cid (29" primary, 2" o.d., with merge collectors & 3.5" secondary). We used PIPEMAX to design the headers.
We ran the engine in this past weekend's VARAC vintage race in the G90+ class at Mosport in Ontario, Canada, achieving 4th place. No way were going to catch the real fast older TransAm cars but the engine was very strong, torquey & easy to drive.Great race, 53 car field!