MicroSquirt.com read only forum (Jan.15,2018)

I've found a company, Price Motorsports, that supplies conversion plates so that I can use a Ford 351W manifold on my 351 Cleveland. This opens up lots of choices. Edelbrock makes a nice 4bbl manifold that already has injection ports and fuel rails that I can put a 4bbl TB on top of or I can use a factory or factory clone aftermarket EFI manifold. The Ford/aftermarket one seems to only support up to a 75mm throttle body. The 4bbl manifold would also allow the stock engine cover on my Pantera and allow me to the already limited view out my rear window. I'm looking to get around 450 hp in a semi-streetable engine. Anyone familar with the pro's and con's of this and maybe tried both?

Deaninkc:

Sorry I can't help you with the adapter plate/manifold question, but if in fact the p[lates do work, I would go with a single plane manaifold.

And don't be surprised if you have a VERY streetable 450 HP.

Are you going to run the stock iron heads? If so, go with the open chamber ones, because I don't think you'l get 11:1 to work on the gas available.

If you had a set of aluminum heads, I'd say GO FOR IT!

I used to have a '72 352CJ Mustang - the 71.5 CJ engine in it. It had the open chamber heads.

The use of the EFI converted single plane intake with 4bbl throttle body is well documented here. They work good, although within the limits of the single plane intake, you could have less low end torque than with a dual plane intake, although the mid to high rpm would be unmatched by any stock type un-modded EFI intake.

There's a guy here, darn if I can remember his handle, that put a 351 in his boat, standard 351w with aftermarket heads, he used a ported truck 351W EFI lower intake with a home built upper plenum to a two barrel truck EFI throttle body, it was really low profile and commented that the boat the engine was in ran like crazy.

As far as the adaptor is concerned, they usually work good, but some amount of trial and error is involved to get the ports to line up without leaks, you will probably have some port matching to do to match them to your 4bbl Cleveland heads. I see they recommend the port inserts as well, probably a good idea given the port mismatch you would have without them.