Original sentence: Awkward packaging under the low bonnet meant the six-cylinder engine was especially susceptible to cracked cylinder heads, a problem not displayed on the Nissan Skyline with which it shares the RB30 engine
Edited sentence: Awkward packaging under the low bonnet coupled with Holden's decision to utilise a cross-flow radiator (as opposed to the up-down flow radiator installed to the equivalent Nissan Skyline) meant the six-cylinder engine was especially susceptible to cracked cylinder heads, a problem not displayed on the Nissan Skyline with which it shares the RB30 engine