RobertYZF

Have a regular cab nite edition with a 302(flat head pistons), gt 40 heads, k&n intake, 4.10s, long tubes, pushing maybe 240 hp. I have a 302 HO I plan on making into a 306 and swapping. Plan to put some afr 185s, ported gt40 upper and lower, maf conversion, not sure which tb and air intake yet but I've been thinking about going with a 351 instead? What's the difference between these two and would my e40d bolt right up to one? Which would be more cheap and reliable? Which has more tq which has better top end?