You probably need to stick with 61. Generally in 141, you need to complete the ENTIRE training program, including ALL required lessons...basically it's hard to get credit for your existing flight time.
Part 61 you need 150 more hours.
Part 41 you would need at least that, maybe 190 more depending on the school.
There is a provision I believe for "testing out" of some 141 training, but most schools don't have the procedures in place for that IIRC.