efi 4.9l 300 i6 cold start STRAIGHT PIPED + TRUE DUALS

This is my 1991 ford f150 xlt lariat. In it is an efi 4.9 300 inline 6 engine and a 4 speed borg warner t-18 transmission. I decided to build my own custom exhaust and this is the beginning of the process. This is true dual 2” straight pipes with about 1-2 feet of pipe out of the engine. Another missing component is my O2 sensor, since i am in the process of welding a mew exhaust I have yet to weld in an O2 sensor bung so it is running rough and idling high. I will try to follow up when i finish up my exhaust, the plan is to convert from 2” up to 3” exhaust pipes using reducer fittings which will go into separate flowmaster super 44 mufflers and then will run 3” exhaust pipes using out either to a dump, a straight out exit, or a side exit exhaust.