Originally Posted by alsadler
head number may also be 14014416
use a champion RV8C or AC delco R42T or R42TS, NGK BPR6FS autolite 144 or 23
Gap at .035".
If your 4000 lb+ truck has a hiway rear gear ratio and tall truck tires its going to be a bit lame with a small CID motor.
lil 283's like to rev.
This is a ideal engine to supercharge to get big truck power and torque out of
a small package. Just right for a 142 weiand blower.
a low engine compression ratio is desired for supercharging 8.5:1 or less.
the #4416 "305HO" cylinder heads make a lot lot more power on any engine once they are fully home ported larger 1.94x 1.60" valves are ideal.
poewrfull heads on a 283 once tweeked by hand.
A diamond in the rough. Its up to you to bring out the power potential in them.
does your 283 have a flat top, dome or a dished piston?
head gasket thickness? any head shaving or block shaving done.
establishing the true engine compression ratio is critical.
truck gear ratio and tire diameter?
very easy to over cam a 283 in a truck. big cam needs big gears, high stall converter and more than stock compression.
all more critical in a 283.
The wrong converter and gears with a cammed 283 in a truck will suck.
What is the manifold vacuum at 1000 rpm?
what is the spark timing at 1000 rpm (no vacuum advance)
what is the idle rpm and idle base timing.?
idle rough/lopey or smooth?
Engine cranking cylinder pressure diagnostic test.... psi
Other engine details, transmission etc.