You can use a ae86 intake if ii want to go the easy route. Since it has a flapper door maf I wouldn't do a "cold air" I would just do a filter and adapter they can be had on ebAy for less then 20 for the super cheap ones. I would buy an adapter and then a rtec filter they are nice yet affordable. Again both found on eBay. Replacing the rubber tube helps reduce air turbulence as well. Something should be a available or just get some 3" bends from eBay and cut and couple your intake together.
74 260Z, Paint, flares, still sorting out the rest
78 Cressida Paint and body done. 1JZ in work
78 Cressida New wheels, T3 suspension, fixing engine and for sale soon.