2 to 4 bbl swap issues
I've just finished up doing an intake and carb swap on a '73ish 360 in my 83 Prospector. This also included new timing set, head gaskets and general tune up items. The TQ came to me completely apart in every possible way, in an ice cream pail. I did my best rebuilding it with a Hygrade kit and new floats as per the kit instructions and online sources. It starts with a few pumps, but stumbles for a moment before smoothing out, then runs nice. My problems are:
- I can't get the curb idle below 900 rpm, even with the idle screw right off he tab.
- I'm unsure of the vacuum hose routing, does anyone have a diagram?
- there seems to be the part that the thermostatic spring in the manifold connects to electrically missing, is the two barrel part the same?
-where should the timing be set? It seemed to like the 83 specs of 12 degrees with the two bbl, and runs well with it there, but not sure if the idle issue is tied to that or not, if I got lower then 10, it backfires through the carb when the throttle is snapped open
The engine has good compression ( all around 130 +\- 5), and idling pulls 20 psi vacuum, though that's at 900 rpm. There is EGR, but it's blocked off. The TQ decodes as from a 75-76 truck 440 standard emissions. It has four vacuum ports, two at the front and two in the rear. I have PCV and distributer off the front, choke off the rear pass. side, rear drivers side blocked, where would the line for the air cleaner hook into? I've taken the carb apart to double check settings, doubled checked timing and vacuum lines for leaks, not sure where to go from here.