Long tubes & frame connectors

Hello everyone I've got a question are ther any clearance issuse with long tube headers and diamond style frame connectors?
I may be getting a 95 HT Z28 and I really like the SLP weld ins or the KB Double diamonds but I'm going to run long tubes and true duals and I'm wondering if they will coexist.
Thanks in advance for any help.

I cant say for the KBDD but the SLP ones, I can not see how they would interferr at all unless you put your pipes under the body of the car, but if you got it up into the tunnel then there shouldnt be any issues at all.

but it depends what your exhaust looks like right now