Ok the b18ft is a much better engine than a Gtt one. I mean pushrod, carb its just a sh*t engine. The Gtt lump is better for tunning but only till the head gasket blows or it over heats! there is no tunning parts or info?? well thats weird as there is a whole fourm dedicated to the engine!! People are running a reliable 170-180bhp and one guy running 225+ (reliably) on the volvo fourms. There are not alot of parts out there for them because the engine was built for a volvo, and they dont really like speed they like tweed jumpers and golf!

People shouldnt slate things so easily if they dont know much about them.
Dave
Oh and they have the same compression ratio as a Cossie