I run a whipalsh roller cam/comp 901 springs in my 85 truck with the nv4500 5 speed/3.21 gears. plenty of torque and very streetable in a daily driver truck as much as a car.
that 85 block is a roller block with a flat tappet cam in there. so for the best bang for the buck IMHO.. go for a roller cam like the whiplash. it is for low comp ratio engines and works with stock TC/gears.
I also ran the lunati 60710 VooDoo roller cam in my truck, almost same specs and the whiplash but a stock smooth idle. ran it with the comp 901 sparings and it did vary well in my truck/stock TC/gears also.
I have run many 318s with 360 heads/stock intake/mopar q-jet/headers/stock HS-TC. also use a LD4B intake/600 eddy/holley street dom with q-jet/RPM intake with 750 eddy carb.
all good combos when tuned/dialed in on the engine.
the comp 901-16 springs are a drop on with stock retainers/seals and work with most mild cam for the 318. I saved a few coins over machine work and double springs for the roller cams I have used.. still kicking them hard daily.
a good set of hedamn 79170 headers/2.25 duels will help the 4-v swap out a little.
some will say no... but swaping in a stock high stall TC replacing the stock low stall TC in there will help with a little more off the line torque with the stock 3.?? gears and tire size??
best 120 bux I spent on all of my trucks and the first thing after 4-v/headers on. the play with tire size/gears when running auto trans.
with the #302 headed 318/whiplash roller/nv4500/3.21/235/75/15 tire it smoke 1,2,3 gears and gets 20+ mpg as a daily driver turning 1600 rpm at 55mph-right in the cams sweet spot.
before changing anything bump the timing as much as it will take to see if it gains any lowend torque off the line.. about all you can do for the stock 85 lopo 318 in a 4x4.