Quote Originally Posted by CHEVYBOY
Gen V blocks are the only blocks that dont have the fuel pump boss cast in the block...Gen IV and Gen VI have a boss for the mechanical pumps..

How many bolt hold on your timing cover? Gen VI block have a composite cover with six bolts as opposed to 10 or the Gen IV
Actually some Gen V and Gen VI have fuel pump bosses and some do not. My ZZ502/502 is Gen VI and does not.

In general I don't understand the knock on electric pumps. You'll be hard pressed to buy a car today that does not use an electric fuel pump. The basic pump and motor designs have been around for 75 years or so; a well made unti is extremely reliable. Electric pumps are also much more versatile, allowing you to readily prime the carb if you run out of gas for insance, as well as providing a useful theft deterrent as previously noted.

I would only go electric personally. My first hot rod in 1976 was a '73 Monte Carlo and I ran a mallory pump with no return and no regulator. Very simple and easy and worked like a champ.

Kitz