just bought a 425 olds. jetstar I , i want to put headers on it...will any olds 400-455 headers fit on? its being dropped in my '72 c/s...is there anything else i should know?<BR>thanks for the info. !! izzyizy@aol.com

400-425-455 are all the same engine externally so headers listed to fit big-block Cutlass will fit this engine.<P>You have a 370 hp Starfire 425. Almost as hot as it got for Olds 65-67, and capable of creating respect even in a heavy body like a 98. Friend had a 67 98 sedan daily driver, he worked with a kid who drove Daddy's 67 396-325 Chevelle to work every so often, and Britt would terrorize the kid with that land yacht every chance he got. The Starfire engine/switch- pitch THM 400 combo in that raggedy old 98 could get it moving right smartly, once it ever got traction. [img]images/icons/tongue.gif" border="0[/img]

Just out of curiousity. What shape was the Jetstar I in when you decided to yank the engine for your Cutlass? It's a hellacious rare car, only 6552 built in 65, and if it's a 4-speed, less than 200 made.<P>I just hate to see those engines get yanked from a decent or restorable car. Most of the W34 Toronados suffered a similar fate. At least the heart keeps beating...