Re: Repairing rusty sills
Like all old cars, rust is always a problem. Also check front and rear lower corners of doors, leading edge of bonnet, around windscreen and bottom of rear window, front guards lower bit behind wheels, under dash up around air intakes (pretty hard to see here - use a torch and get a mate to run water into the vent panel under the screen - a leak here will generally mean rust and big bucks to fix. Lower rear quarters behind rear wheels collect crud and rust out. Also check under battery tray and radiator rupport panel. Floorpans also rust - mainly front ones. Have also seen rust in the top of the doorframe, so have a really good look at all these areas. Check under boot rubber seal as you can get tinworm there too. Be wary of any car that has had the lower panels done in that ripply 'stone guard' as it may be hiding bodgy repairs.
Sounds like a lot but they were certainly no worse than other cars of that era!
Only problem with replacement sills is that they don't have the front and rear ends on them, if yours are rusted out, you will have to fabricate them yourself.
IMHO go the 351 - weighs about the same as a 302C and has greater output!