Big block work out only 300 or 400 more after you take into account
Machining. We use MTc ( and surply) you can order them already
honed to size. Heat becomes your prob when u get up around 1500cc
but only stand still in traffic really. There are some cool tricks to over come
this, I'm looking forward to trying them on mine and loging the results.
Nothing wrong with smaller cc's but love big lazy grunt :-)