Just pulled the heads intake and distributor off a 366t engine this afternoon, the cast iron intake is a high rise square bore intake (not spreadbore), will this have enough flow for a 500 + cubic inch engine, the heads are large oval ports but they have small intake/exhaust valves, can you have larger valves(seats)installed (2.06/1.72 or 2.19/1.88) in these heads, and will they work with the above mentioned engine size, casting number on heads 473328, date 1978, is there any way to post pic's

thanks