[Augusto]

The car is running, the engine performs very well, better than I expected, it has as much torque as the original 351W, but it goes flat at top end, it's a low revs engine definitely.

I ended up using a chevrolet 2GC carb, I made a carb adaptor with 1/4 inch steel, that's like a box, about 1 inch tall, and as large as the carb's base, probably like 4x3 inches, one hole for the manifold on bottom side and two for the carb on the opposite top side, I don't like much the idea of feeding a small manifold hole with two bigger bores, but for now it's running great.

I'm having this problem though, when I come to a stop in a traffic light, most of the times the engine stumbles and runs very rough, nearly stops and shakes badly, I have checked everything possible and impossible but can't find the problem, could it be the carb adaptor creating some turbulence or holding some fuel or something weird inside that causes this problem? the engine stabilizes and runs smooth after a few seconds, idles fine.

I have not being able to determine if it's rich or lean when it happens, have tried leaning it opening a vaccum port but runs the same, also squirted some gas inside to make it rich but also runs the same, ignition is @ 10 deg, all ign parts are new.

I have this turbulence toughts in my head from the adaptor, could this be possible?

[Grease_Fever]

Have you checked the float?

Here is some info on 2GC:

Rochester 2G, 2GC, 2GV Carbruetor Manual - The Old Car Manual Project

[Augusto]

thanks that site is quiet interesting, found some very good info on old stuff, I'm gonna tear the carb appart to see what's inside.

[Augusto]

finally most of the bugs are killed

the car runs great after several issues with the engine

main problem ended up being the valve train, not sure why it happened but had to shim the rocker arm pedestals to fix this stumbling and poor idle, the valves were not sealing well, after the shims, a brand new caburetor and electronic ignition the car runs as good as it did with the V8, it even has more low end torque than the V8 engine, since it's not a race car I'm very pleased with it's performance, my son drives it daily to and from college.

the duraspark module quit once but it ended up being a wrong coil, at first I used a TFI coil but it overheated the module, I installed a universal coil with resistor and now the module runs almost cold.

I ended up using two cooling fans one aft and the other behind the radiator, never had any cooling issues

the C4 is giving me some trouble, sometimes it starts in second and others it won't shift to 3rd, but that's another story.

I'm gonna lower the ride height now, it will look cool sitting a couple of inches lower.

I'm leaving a picture of the engine bay with the huge I6 engine, and for anyone who dares to try this swap I definitely reccomend you do it, this 300 (actually 306 with the .40 overbore) has nothing to do with the anemic 230 and 250 engines that ford put in their cars. I bet a turbocharger and EFI will make it a real mustang eater.

thanks to all for your comments and toughts,

[Highball]

Don't let that 300 six fool you. There is a 300 in my city in a 66 Falcon that eats V-8's for lunch at the local Drag Strip. 660 HP and it is a very strong competitive engine. I know you aren't thinking racing probably but just look at the potential this engine has. It is probably the strongest inline engine made in this country. Good luck too. Just use your search engine to look for some performance parts. They are available from several sources. One in these photo's is a Nitrous 250 Ford inline and 10.0 second times are not unusual in the 1,000 foot Drags.
Normbc9

[Augusto]

not sure if racing this engine would be wise due to the cost of the parts needed, but for a high performance street bound car I found it a real nice choice, maybe a supercharger, say a weiand 142, would be perfect for this engine, the turbo needs higher revs to shine but the roots blower will make a freight train puller out of this big block six.