I'd have to see part numbers but the 64/63 7 bolt oil pump should be exactly the same. same for the water pump and timing components. I've never read anything about grinding down the tensioner to use a 63 belt... honestly I dont see the big deal in just getting a dohc 64 belt.
Are the AWD and FWD oil pans different? I was not aware of this, as I thought they were all the same. The 64 oil pan is deeper though.
More importantly if you use a 63 pan, make sure you use a 63 oil dipstick.
if you use a 64 pan, make sure you use a 64 dipstick.
You can use an evo3 oil filter housing. It has the provisions for an air cooled external oil cooler just like the 1990 6 bolt housing. A few of the DSM vendors sell these.
If you use ARP studs for the head, you will not need to line hone the main journals. This is only if you use ARP main studs. Also, there is a company that makes dowels to keep the main caps lined up on the ARP studs(since they are slightly smaller in diameter) but you would still need a line bore WITH A TORQUE PLATE.
I'd just stick with OEM mitsu main bolts. Unless you plan on making 700+hp(which is about 200hp more than you'll want to throw at eagle/wiseco combo)
as far as water pump they are all the same, but for the coolant pipe, its more a matter of what t-stat housing you want to run. The 2.4sohc t-stat housing is in an akward/ugly place and idk if its even compatible with the dohc setup. The 2.4dohc thermostat is what I run on my 6 bolt, and it allows me to use my factory radiator with radiator cap. I think it would be hard to find that t-stat housing. so you'll have to run the 2g thermostat housing(or your 1g will be fine) Only thing is the radiator cap is on it so... idk you'll probably have to get a 2g radiator(without the radiator cap)
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