|
1) Cylinder heads. Haunt the swap meets and find a pair of "3-line" GT-40 heads or a set of "4-line" GT-40P heads off an Explorer. If you get the P heads, try to snag the exhaust manifolds as well because they will not work with your stock manifolds. Alone or with the right other stuff either of these heads will give a lot of gains and allow a further buildup.
2) Headers. Shorties give as much HP gain as long tubes but long tubes give way more mid-range totque. The P heads take different headers.
3) A high flow cat and a 3" cat-back exhaust
4) An Eddy truck EFI intake and T/B
5) A midrange cam would be obvious except your 86 block isn't roller ready and aftermarket flat tappet cams are becoming problematical with today's oils. Consider a set of 1.7 roller rockers with the stock cam for a nice gain.
|