Highdesertrat

Although I don't foresee any rock crawling , I would like to be able to cross a few streams and be able to deal with the crazy springtime mud around here. So the extra traction in addition to the ground clearance would be handy. Do you really think it would be an additional 1000# ? Divorced transfer case and solid front axle w/leaf springs , replacing the existing front suspension. I was guessing 4-500# additional weight.

I recently (ok its been year already) acquired this 78 Sunrader . It has just a little over 54k miles and other than a weber carb appears to be bone stock. That's the good news. The bad was it had been sitting for the last 15 years and as far as I can tell had travelled less than 2k miles since 1991.I have been slowly going through the truck and so far have gotten to: 6 new tires,new windshield , new radiator, new coolant and heater hoses, new fuel line and filters, new house and starting batteries, replaced cracked exhaust manifold,valve job, rear differential fluid ,etc..... Finally have it running really well and really enjoy driving it. Recently averaged just shy of 23 MPG driving over the pass to Portland and back . My only complaint is the ridiculously low ground clearance. Which finally leads me to my question.: I have been toying with the idea of a 4x4 conversion and am curious about the viability and or opinion on such a conversion? I have read most of the threads on the forum regarding converting a 620 , it seems the least expensive route would be to find an older 620 with a Dana 30 and T20 transfer case and swap them over , but would be open to any suggestions. As a note it is in no way my intention to do any serious offroad work, would like to be able to explore mostly fire roads and some rutted two track out in eastern Oregon.

Thanks everyone for the advice. Searched every Oregon junkyard and finally found a manifold in Euphrata Wa , and had it shipped to me over the weekend. However it appears that it may possible be from a later model? There is some sort of exhaust valve that is not present on mine. I am wondering if I should take it to the welding shop and have some sort of block off plate installed ? Also if i cut and flatten the EGR pipe will this cause any drive ability issues? It appears a previous owner cut and flattened the individual air injection pipes running into the manifold.Here are a couple of photos of the old cracked manifold and the latest junkyard find.

Hello I am new to the forum and to Datsuns and have recently purchased a 1978 620 17ft Sunrader with a cracked exhaust manifold. I was originally hoping to fix an exhaust leak and upon removal found out the manifold was in two pieces held together by a hose clamp and perhaps something like JB Weld. I addition one of the flanges has broken off. Having a whale of a time trying to find an inexpensive replacement. Tempted to order a shorty header from Top End performance for $179 , however it is uncoated and looks like it would require having an exhaust shop weld up connection to the downpipe. Not sure how much this would be but guessing $150 to $200? Any ideas and advice would be greatly appreciated

Hoping to find a replacement round bore manifold. Mine is cracked beyond repair. :angry: Thanks,Joe