I have had the LD4B on a 360 engine and a couple 318s with the 360 heads. the small runner/ports keep the velocity up going from small to large port and worked rather well on the street daily driving.

I have been dropping 360 heads on 318s since I was 15 and now I am 56 don't care what negatives people SAY it has as it works and makes up for it in the mid to top end RPM range. exactly why Ma Mopar did it in 85 for the 318. and it got a bump in CR to the 9.0 to 1 and used the q-jet/intake.

FYI...

stock 318 2v = 150 HP @ 4800 rpm

stock 360 headed 318 4v "police engine" = 177HP @ 4800 rpm 85-91

now the "police engine" did run a better cam with the 360 heads/q-jet

Ma Mopar did a few good things for the teen from 85-91 and sure made plenty of them.

I open the bowls up and clean up the runners home porting the heads and install pistons backwards to change piston rod offset and use about 214*/228* dur @ .050 with .485/.500 lift and my little 318s are screamers in daily traffic. run mid 13s 1/4 mile track 4000lb truck.

old skool tricks still work for the poor man 318 daily driver.