Untrue. 400's do not heat up at idle unless some doofus builds them incorrectly. Don't be affraid to build that motor up! I rode in a 427 about a month or two ago (1BAD80's car). He has it bored .060 I think, stroked out and runs 12:1 compression, a giant cam and pounds 700 horse out of the motor. Cruises down the street with a stock rado and a I believe a stock pump at 170 degrees or so.59chevyapache said:I think it could be done but the cylinder walls would be really thin. They are already thin to begin with thats why 400sbc heats up at idle easily. I think if you were to do it you would want a big crank but i truely have no clue if this is possible, but i was wonderign the same about my 400. I think it would have to be a limited use engine.
tell that to 1bad, I've seen the motor first hand. Stock casting.87442lover said:Not possible on a 400 SBC, or SB Olds(very NOT possible on the olds). The walls are too thin, sometimes you can only go .020 over and no more. Just a fact. If you can manage to find a decent SBC 400 and bore it .060 over(have to check walls first), you can buy the 434 stroker kit and cal it a 440 :thumbup: