Another Carb Question..Before I make a big mistake..

I have a 454 (mid 1970's) LS7..compression is 12 to 1, serious over lapping cam (no specs), tunnel ram with 450's, iron heads. The carbs have always been too small. I have an opportunity to pick up some near new Edelbrock 750's very cheap. The advantage of the Edelbrocks is that my fuel lines can stay as they are, just move to the other side of the carb...question is, is that too much carburator or am I making a big mistake. I don't want to use larger Holleys if I have to mount them sideways...thanks

Another Carb Question..Before I make a big mistake..