couple questions

i am putting in a 306 with forged internals and twisted wedge heads, i planned on putting the gt40 upper and lower intake on it but i have the trick flow track heat upper intake sitting in my garage i just need the lower to match. i was wondering if yall thought buying the lower trickflow would be worth it or would it not be much diffrent from the gt40 upper and lower.

also, i planned on putting the stock 19 lb injectors in it but i wasnt sure if they would be sufficient for this motor. i have a maf for 30 lb injectors but i dont know if 30s would be overkill. would buying 24s and a maf be my best bet or would 19s or 30s work too?

thanks