Here is the answer to you problem. In summit racing magazine it says this is deisgned to fit a 90 mm mass air meter directly onto it. It does however say that you will have to use an egr delete, aftermarket fuel rails and adjustable pressure regulator.
Trick Flow Specialties TFS-51500009 $799.95
Estimated Ship Date: Monday
Brand: Trick Flow Specialties
Product Line: Trick Flow® Box-R-Series Intake Manifolds for Ford 351 Windsor
Part Type: Intake Manifolds, Fuel Injected
Part Number: TFS-51500009
Engine Block Style: Stock/OEM standard deck
Injection Style: Multi-port
Basic Operating RPM Range: 2,500-7,500
Intake Section Included: Complete
EGR: No
Injectors Included: No
Fuel Rails Included: No
Aftermarket Fuel Rail Required: Yes
Throttle Body Included: No
Throttle Body Bore Diameter: 90mm
Supplemental Bosses Cast-In: No
Supplemental Bosses Machined: No
Runners Included: No
Runners Removable: No
Plenum Material: Aluminum
Plenum Finish: Silver powdercoated
Base Material: Aluminum
Base Finish: Natural
Quantity: Sold as a kit.
Intake Manifold, Box-R-Series EFI, Aluminum, Silver Powdercoated, Multi-Port, Ford, 5.8L, Kit
Check to make sure this part fits your application Race performance right out of the box.
When it comes to making horsepower, one size doesn't fit all. That's why Trick Flow® designed their Box-R-Series intake manifold for Ford 351 Windsors. Each manifold is computer-engineered to deliver an excellent balance of airflow distribution and velocity to increase low-end torque and provide superior high-rpm horsepower. Trick Flow® Box-R-Series manifold uppers are made from A319 aluminum and available in silver and black powdercoated, finishes for long-lasting good looks, or in a natural version for those who prefer a natural aluminum look or wish to use a custom finish.
Additional features include:
* Large cross-section 11.000 in. runners
* 2,500-7,500 rpm range
* 90mm throttle body inlet
* 2.000 in. x 1.200 in. port size at cylinder head
* 12.750 in. overall height to the flange
Instructions
tfs-in-9ra r0.pdf 1.37 MB