Hey guys I wanted to get some feedback on those of you that have an older 4L60 trans on you LS swap. I am going to use my 1994 4L60 without PWM on my 5.3. I already have the LS dished flexplate bolted up to the engine with the spacer at the end of it with the elongated flexplate bolts and have opened up the flexplate bolt holes to line up with the 4L60 torque converter. I just wanted to know how you guys personally had the LS PCM work with the older 4L60 ? Any simply mods done to make the trans withstand the power, like a shift kit, different torque converter ? I was simply going to change the internal trans harness to that of a 13 pin and add the PWM solenoid to the valve body. I read about this on a previous thread and was thinking it would be easiest way to go on my application. Also I would like feedback from you guys on how that 4L60 has been holding up, I do NOT plan to race or abuse it, just the occasionally "push" when I need it. If I were to run a 4L80 in the future, I would not have to have the PCM reflashed again, is this correct? That is another reason I was going to change the internal trans harness. Thanks and this site has been awesome so far for the swap !!!