Isuzu Forums - Isuzu Enthusiasts Forum - Ratio Help and Advice needed Pleeease

I hope someone can help me as the clever people here in South Africa are not really that clever or they just do not want to actually help me.
Here is my dilemma and what I have done to cause it.
I fitted a LS1 V8 stroker motor (383ci) to my Isuzu 4x4 pick up. It was a 3.2 V6 4x4.I do realise that you do not have the same models but hopefully someone can send me in the right direction.
My problem is that I cannot seem to find anyone that can help me with sorting out my gear ratio’s.
It came standard with 4.3 ratio which I changed to 4.1 which was still to high. The 4.1 ratio’s I got from a 2001 Rodeo 4x4 differential which I imported from the States as I wanted the disc brakes for my rear differential. The front centre portion was a direct fit from the Rodeo to my Isuzu.
Can anyone tell me what make the front diff is? Is it a dana 30 or 35 or is it a fong kong special.
Can I get a 3.07 ratio for the standard Isuzu front differential? When I ask the clever people here, all they tell me is that it is an imported differential and then, Sorry can’t help.
Also, I am looking for a Dana 44 rear with Trac-lok(LSD) but with a 3.07:1 ratio or actually anything that I can build in there that will work where I can change the ratio’s until I find the correct one.
At the moment I have 3.73:1 ratio’s in but it is still to high. I am running about 1200 Rpm to high at 75Mph(120Km/h) and it is gulping fuel. I get about 300 Km’s on 75lts of fuel. So you guys can see my dilemma and with the price of fuel going up all the time you can understand why I need to get the Rpm lower.
My other option would be to get Dana 44 differentials, front and rear form a jeep Wrangler/Rubicon and cut them up and rebuild them to fit.
Any ideas/suggestions or even other options to explore would be appreciated.
You can mail me directly if it is easier: ls1demon@gmail.com
Hope someone can help.

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