Hello, I have never owned a mopar with a manual transmission, only torqueflights. I was wondering with the tremec 5 speed conversions that they are offering, does the NP2500 or AX-15 5 speed transmission have any worthiness as far as a performance application if used in moderation. I have a 1971 340 Challenger with a 727 and toyed with the idea of a manual. Do either of thes trannys mate to the "A" engine or are they Magnum trannys? Lastly, I know of one hooked to a mid to late 80's slant 6 out of a full sized Dodge van that I can get free, but I was'nt sure if the slant six bellhousing was compatible with an "A" engine. Thanks for any info you can give.