is there really no replacement for displacement?...

britdart said

hi FABO, i've had my '70 swinger for almost a year now and she's absolutely wonderful. But she's only got the stock (yet extremely clean) 225 /6. i've always driven faster cars, and although the low end torque is nice, the high end torque simply doesn't exist. She's a brilliant engine, (she lasted 400 miles and back upto lake shasta a few weeks ago) but i really need to get some more power. Is it worth me getting a 2 barrel carb, header exhausts etc (and possibly even a turbocharger) or is it best just to find a 340 to throw in? i'm in no great rush, but if anyone has any opinion on the matter, that'd be great - thanks

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The easiest thing to do would be to do a leak down test on the 225, if all is under 10%, You can then remove the head, have a performance valve job done with larger valves installed and blended in, mill the head .080-.100 and stick a 'mild' cam in it with some ford 370 springs or olds, both are common of the shelf 'cheapy' springs that work great- done this before.
Then run a 3.23 3.55 gear. done

Or if you can afford a lil more...also stick a holley 350cfm 2brl with super six intake and clifford header and 2200 stall.
..and later try a 4 brl with clifford intake, but know the cam will hold the potential of that addition back.
It'll be quick and cruise the hyw's 80mph with plenty of passing power.
jma.

and... the slants running 11.96 around these parts...be also running 12.5 comp &.600'ish lift , slants head seal hates that much pressure=pop!
There's also Buick turbo swap onto the slant that works decent I hear, according to a guy I know in venice beach..