Well I have a 89 Civic with a GSR swap, as of right now its completely obd0...Well Im slowing getting the parts to convert it to obd1, I have a buddy thats gonna sell me a unchipped P28 and he will chip it any way I want...Now Ive heard only a P72 will operate the secondaries on a stock GSR manifold...So I was thinking about using the ITR maps and just unplugging the vacuum line to the secondaries and run them open all the time until I can upgrade to a Blox or S2 manifold...Will this hurt anything?? I know I wont have much power in low RPMS but will it kill my gas mileage???