My answer was based on the 5.0 question, but if it were my car, I would also go with a 351W in a heartbeat over the 8.2" deck blocks. Everything is stronger and easier to make horsepower and torque. I have four stroker 351Ws at present, and find them easy to fit in the '67 up Mustang, Cougar, and '66 up Fairlanes, Comets, Falcons. I also have a 306 LX Coupe with 5 speed, so I can compare the differences in driving ease. My '86 GT has the 383W with a 3.750" stroke. A 3.850" stroke gives 393/395W, 4.000" stroke gives 408/410W, and you can go 4.100,4.170,4.250" strokes for more cubic inches. The weight difference with aluminum heads, aluminum water pump, headers, aluminum intake manifold is only 40 pounds over a 302HO. Going to the Dart aluminum block, or Dart iron blocks gives you all kinds of options for cubic inches in a small lightweight package. Building horsepower this way is so much easier, IMO. I have a 4.040"W x 4.000" which gives 410CI which would fit your avatar perfectly . Joe-JDC