Good Day!

I have a ccc delete olds 307 from 1987. I am going to put a Edelbrock 1405 on it. Do i still need these tubes or can i just block them off just like the egr?
Thanks in advance.

Greetings
Jeroen Dogge

 

You don't even need to block them off. Simply pull them out. The part inside the heat crossover is just a loop and doesn't connect to anything else.