Re: Cams 4 Sprint
Unless you are going very modified, the 40mm carbs are plenty good / big enough.
I use the 1500cc cam carriers and 105bhp 'green cloverleaf' cams on my 1700cc 8v production spec racer (as do most others). With a standard manifold and light porting on the heads, it gives about 135bhp. Other than ram pipes and ITG filters, the rest of the engine is factory standard including 40mm Dellortos. So with some light head porting, mild cams, filters and a good manifold, you should be able to get 140 to 145 bhp quite easily. I'd go for Dellortos, as you get better mid range, top end power is the same with Dellortos or Webers in my experience.