Volvo V70 R / T etc. – best “base engine” B5234, B5244 or B5254 ?

moin ! is just about to give me a v70 beautiful spinning (or I know that it is beautiful, I mean of course the purchase). base should be a v70 of the first generation, so fl after 850, 5 cylinder turbo, i.e. 2.3 or 2.4 ltr. lifting space. with a healthy starting base I want to give the engine even more air or steam, i.e. downpipe, exhaust system etc. which of the 3 mentioned motor variants is considered as stable or has the least bitches ? whether lpt or hpt is secondary, the mo tor should simply run freer, have a little more horses and do this for a very long time. most interesting combi I would find the first xc with the engine power of the r… you will probably still be allowed to spin ah, hand switch is mandatory.