Webber Carburator Fuel Pump

[SubGothius]

The power difference was mostly a matter of larger displacement in the short block (bore x stroke of 85 x 88 mm vs. 86.5 x 100 mm) and also fuel injection, so just swapping the 8v SOHC heads won't make much if any difference in power unless maybe the 4G64 head has a smaller combustion chamber, which would raise your effective compression ratio slightly.

I'd expect the 4G64 head gasket to have a slightly larger cylinder diameter to match that bore, so use the 4G63/G63B (the B variant indicates a jet-valve head AFAICT) head gasket to match your block bore diameter. Also check that the 4G64 combustion chamber is fully enclosed within the G63 gasket's cylinder diameter when you line up that gasket against it, and also compare the coolant and oil gallery passages. If the deck-to-cam-center distance is the same for both, the G63 belt should prolly work.

[Tonka]

Ah, that's a shame.

Good news though! I was able to pick up the Sport Cluster which was easy to install. Tach didn't work, but I ran a wire from the Neg Ignition coil to the IG - on the back of the dash. I ran another wire from the OPU on the back of the dash and spliced it to the connecter to the oil pressure switch. I should have a sender in here pretty soon so works correctly.

Got the Jet Valves out, was pretty easy, but it did require pulling out the top of the valve train.

[Tonka]

Been trying to install an electric fan, while I was at it I ended up buying this aluminum radiator off of Ebay that was listed for our trucks.

https://www.ebay.com/itm/387716535781

It was cheap, but of course it didnt fit

But what I didnt expect was that it was MUCH taller than the OE radiator, so it hits a support on the bottom. I'm not sure what that support is called, but do you all reckon I can chop into it (or potentially chop it straight off?). Might not be wise to buzz into the frame, but kinda like this radiator, and I got an electric fan mounted so nicely onto it.