Let me start with adding my welcome to CHR.

Your efforts to get the Fairlady on the street are commendable and your father would be proud. I too think that the 750 is a bit big. Short of buying a new carburetor, there are several things you can do.

1. Set your fuel pressure to 5psi – no more.

2. Replace your stock jets (.113) with a .107 (Edelbrock part 1431 – $5.99 at Summit http://www.summitracing.com/search?S...elbrock%201431)

3. Replace your stock metering rods (071 x 047) with 068 x 047 (Edelbrock part 1447 - $11.99 at Summit http://www.summitracing.com/search?S...elbrock%201447

4. Get the gasket set as well – Edelbrock 1472 - $10.97 at Summit http://www.summitracing.com/search?S...brock%20gasket

5. If you don’t already have the Owner’s Manual, download it at, http://www.summitracing.com/search?S...brock%20gasket

This is really a pretty easy fix, but you need to take your time and be very careful as there are several small parts involved here. I have done a lot of these and it takes me about 30 minutes but if you have not worked on a carb before, I’d recommend you take it off the car and accomplish this on a thick stack of newspaper covered by a white absorbent cloth in an area with a lot of light. The above will certainly help in the fuel delivery area and you may find it takes care of all the issues.

In the event it still bogs down, a different carburetor would be recommended – I like Quadrajets as well but there will in all likelihood be a manifold conflict between spread-bore (Q-Jet) and square-bore (Edelbrock). The 1406 Edelbrock would be a good choice for ease of installation and not having to change your intake manifold.

Also check your timing – 8 degrees initial and 30-34 degrees all in should work fine on most SBC combinations.

Let us know what you come up with.

Regards,
Glenn