I have to disagree with that statement Foxy. Within our small crew of RC speed junkies, there are no modified chassis or cars that have been lengthened. I myself went 113 with a nitro 1/10 scale on a stock chassis, MiamiJato has an electric Losi 8ight on a stock chassis that has gone 128 and there's an OFNA GTP out there somewhere that has gone 141 with the stock length chassis. I understand that 150 is quite a bit to chew off, specially if you haven't taken the proper speed steps (100-110-120-130-140-150) but I would start with an "off the shelf" set up and push that to the limits. Then see what's lacking and make changes accordingly.