LM7 5.3 L LS (cast iron block) fits within the allowable CC range but you quite often see people putting 5.7L and 6.0 L LS engines. I used the weights from the sedan with the hydromatic.
Apparently some people have been known to bore the 5.3L out to 5.7L as it is the same block. I would never do such a thing though………..
Maximum engine size for FB/EKs Holdens under NCOP
Re: Maximum engine size for FB/EKs Holdens under NCOP
For the record 

FB ute fixer upper, EK van on rotisserie


FB ute fixer upper, EK van on rotisserie
getting my FB ute on the road
EK van on rotisserie
EK van on rotisserie
Re: Maximum engine size for FB/EKs Holdens under NCOP
Over here they bubble test them .........TAZ wrote: Thu Sep 04, 2025 6:44 am
Apparently some people have been known to bore the 5.3L out to 5.7L as it is the same block. I would never do such a thing though………..
I started with nothing and still have most of it left.
Foundation member #61 of FB/EK Holden club of W.A.
Foundation member #61 of FB/EK Holden club of W.A.
Re: Maximum engine size for FB/EKs Holdens under NCOP
When I engineered the wagon, the block number was checked. It is a 350 block, with a 327 crank. It was suggested I needed to pull a head and demonstrate it was a 327. I supplied the build sheet, and the engineer recognised the builder and trusted him from past experience.
This kind of experience makes me think more like Smokey Yunick, and hence this thread. If I can demonstrate compliance, my life is easier.
Cheers,
Harv
This kind of experience makes me think more like Smokey Yunick, and hence this thread. If I can demonstrate compliance, my life is easier.
Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.