What best? Only looking for about 300hp, But im bugged to what power plant I want

Im thinking off fitting a standard Zetec into my RWD S2, then later on, build a fairly reliable ZT or YB!.... but whats the cost of a ZT compared to a full YB?!


Not sure, and its pissing me off ?!

Cars going to weigh about 900/950kg in total, maybe a bit less...

Help me decide please...