Marussia sporting director Graeme Lowdon has hailed the team's 2014 engine deal with Ferrari saying it gives them reason to be "quietly optimistic".
With Formula One switching from the current 2.4-litre V8s to the 1.6-litre turbocharged V6s in 2014, Marussia will swap their Cosworth engines for Ferrari power units next year.
Marussia, who finished 12th in the first two seasons and then 11th last year, are confident they take a "huge step" forward next year.
"It will be a huge step forward in terms of degree of parity compared to some of the other teams," Lowden told Autosport.
"The ideal scenario for us at our stage of development would either be maintaining the current rules or an enormous change and 2014 is the latter.
"We are confident Ferrari has made lots of the right decisions in its powertrain so we are really confident that, married with the car we have already designed, we are in a good position.
"This is the kind of step change we really need and we are quietly optimistic about the performance of the 2014 car."
Engines are not the only things that Ferrari will be supplying to Marussia next year as the technical agreement includes the supply of gearboxes and other systems.
Lowdon believes the partnership will help the squad to put more energy into the development of their chassis.
"There will be a strong focus on the chassis," he said.
"At the moment, we do a lot on the gearbox side and unlike some of our immediate competitors we don't currently buy a gearbox in.
"The good side of that is we understand that side of the car very well and that will be a plus point in working with Ferrari.
"Looking at the 2014 powertrains, the various strategies on how you use it will be a key area.
"The fact we understand a big chunk of that already, because we are feeding back into the design of what is effectively our own gearbox, is a useful skill set."
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