AK71CutlassS

Are the belts from a 350 to 455 non AC swap using the same brackets bigger?
If so anyone have PN's

svnt442

Any parts store should have them, and yes they are longer.

oldcutlass

You may be able to use the same belts because there is room for adjustment.

svnt442

Not that much room.

svnt442

350:
http://www.oreillyauto.com/site/c/de...0074&ppt=C0007

http://www.oreillyauto.com/site/c/de...0074&ppt=C0007

Alt belt for the 455
http://www.oreillyauto.com/site/c/de...0074&ppt=C0007

The P/S belt is the same because the lower dimensions of the blocks are the same, but the alternator belt is longer because of the taller deck height and the extra width of the block.

AK71CutlassS

Cool. Just got back from Napa. Looks like the alternator belt is couple inches longer from 350 to 455. Just got my brackets back from powder coating

oldcutlass

Definatly not the same with the aluminum heads

svnt442

That wouldn't make any difference. The mounting holes for the brackets are in the same location as the factory heads.

AK71CutlassS

Agree 100%

joe_padavano

The aluminum heads are not the issue. It's the 1" taller deck height that moves the alternator further away. As noted, the PS pump stays in the same position relative to the crank pulley on both, but the alternator does not.

oldcutlass

My mistake on the alum heads changing accy positions, wasn't thinking, however I did take into consideration deck height and thought depending on which end of the adjustment spectrum the belt fell into it may reach.

mrolds69

I really like the way the engine looks with the painted aluminum covers and contrasting heads and intake. Nice job!