Okay guys, I have a 71 340 I am putting in my 67 barracuda. My cuda had a 273. Can I use my 273, water pump(cast-iron)pump pulley, and crank pulley? I ask this because, I would have to have my radiator switched, if I go to the 340 wp. Also the 340 had a/c powersteering,etc. so it has a 3 groove pulley, where my car has none of. The 340 wp will not work with any of this because it is a longer pump. My 273 water pump is an after market that has 8 blades, wheres the 340 only has 6, but it is aluminum and has a little more area to it. If I use my 273 pulleys and water pump, will it cool enough? I noticed that from 68 to 69 the 340 and 273 used the same pump. Does the more blades help? Will my smaller pulleys be okay on my 340? Thanks