anyone have the specs on a 525 engine..block used..bore ..stroke..rod length..ect

i read my owners manual and could not find any internal info.

the 525 efi is a 502 ci with 4.470 bore and a 4.0 stroke and uses a Manley h beam rod instead of the gm rod with the major differences to the 500 efi being in the heads cam and ecu it's a good running engine hope this helps you out Sincerely yours Laz Mesa
www.mesabalancing.com

any upgrades available for the 525?

Whipples!