Thanks for your reply. It seems that "A" cams are not readily available in the US, probably I'll just get that from home. I'll get the pushrods, lifters and timing gears from here though. Yeah, the Volvo has been "relatively" economical with the single Zenith, the 175CDe by the way, but where it lives right now in Malaysia, the roads are dominated by small 4 bangers (1.5cc or less), and even 3 bangers are not uncommon. Given the tropical climate where A/Cs runs all year long, there's barely enough punch for some of the cars to literally make it over the hump. In perspective, the B20(A) has enough pep to keep up with the rest of the pack, so to speak, which is why we still see many Volvos of that vintage running around in that part of the world. Unfortunately, that drives prices of spares up, which is why I am getting some necessary parts from the US since my stay here will be coming to an end soon.

Speaking of "American Engines" and power, I currently drive a Ford Mustang with the modular 4.6 V8 in it, and that beast swallows all the hills and mountains during long interstate haul like they wasn't there, not to mention its ability to peel the asphalt off the street when you jump on the gas pedal. Downside? My buddies call me "Friend of OPEC!"
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1974 144DL Euro specs ( Single Zenith Carbs!)