Thanks Mikey, appreciate the tech on the pistons. I know now why I have never heard of putting 383 pistons in a 413, that would be way to easy a "fix" for the rare slugs. Will be sure to avoid those truck pistons too. Kind of surprised that the performance parts makers don't supply them too. The pits is, you can buy just about any shape, size, ratio, and acceptable material for a "chebby" boat anchor, but not so for a brute MOPAR. Bill Roddick Port Orchard, WA 1964 Imperial Crown 4 DR HT 1972 'Cuda 340 (Tami's Toy) 1988 Cherokee Laredo 1995 Concorde ----- Original Message ----- From: "mike sutton" <mikanlin62@xxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, December 22, 2003 8:16 PM Subject: IML: Piston swaps and brake bleeding > The pin height of a 383 piston is not the same as a 413 or 440 piston, so > the idea of putting a 383 piston into a raised block ( 413 - 440 ) engine > doesnt work. Yes you can bore the thing to gain the proper diameter ( a 383 > and a 426 both are a stock 4.25 bore for example ) but the rest of the > equation wont work, the location of the piston pin in the piston is not the > same, and neither are the rod lengths or the strokes between a 383 and its > bigger brothers. Unless you want to cough up the dough for custom pistons or > rods, the choice is yours. > > Dont blame me, Im just the messenger. Any good B/RB reference book, the > older Direct Connection - Mopar Performance stuff goes into this in depth. > 413 pistons, for example, are rare yes, but not impossible to find. > Silvolite or Badger still offer them last time I looked, but dont get > suckered into using the later model truck pistons out of motorhomes unless a > compression ratio of about 7 1/2 to one turns you on. > > Regarding brake bleeding....there are also some very very kewl brake > bleeders that you replace your stock bleeder screws with. They have a built > in check valve, so when you want to bleed the brakes you loosen one of these > bleeders at a time, and then you step on the pedal as usual without worrying > about having someone there to close the bleeder when you let up, as the > check valve takes care of it for you. When done, you just tighten the screw > as usual and move to the next wheel. > > Im sorry that I dont recall the brand name, they are in Summit, Jegs, and > many other of the performance oriented stuff. Next to a pressure pot or a > mity vac, one of the best bleeding ideas around. > > Mikey > 62 Crown Coupe