Does anyone know of any online guide to porting an FE intake? Or have any advice? A while back I saw a web page with instructions on how to port an old Streetmaster 390 intake, but don't remember where it was.
That would be for reference though, not working on a Streetmaster. This is a brand new Edelbrock Performer. I am going to work on it for a friend. We were shocked at how this thing came out of the box. The ports are tiny, *none* are the same size and 3 of them aren't even the right shape.
The intake is going on a new engine he just built for his race car hauler. It's a cherry 69 F350 ramp truck. Posting here instead of the truck forum due to the engine combo. He bought the truck new and it has a 390, T-10 4 speed, headers, 750 vac sec Holley, Duraspark conversion. The engine was rebuilt about 14 years ago and is getting tired again. Rather than have down time since racing season almost never ends here, he has built a replacement engine, then he can freshen the original at leisure.
Russ, you saw the truck last weekend. Used to haul the Roy's Toy Maverick.
New engine is a cool setup: 417 ci FE, 9.5:1 compression. 427 medium riser heads, totally redone, but stock ports. Cam is a Comp Cams 260H .484/.484, 212/212 @ .050, 110 lob sep. Will use the same carb, ignition and exhaust. He is also pulling the T-10 4-speed and putting in a NV 4500 5-speed trans. This is an aftermarket 5 speed, the same one used in the 1 ton Dodge trucks with the Cummins Turbo D. They make an adapter to bolt it up to a Ford bellhousing. Same first 4 gear ratios as the T-10, plus a .73 overdrive.
Now the intake: The gaskets match the heads perfectly, but are much larger than the intake. Plus the previously mentioned problems with the intake. I need to open up the intake ports, but how far? What shape? I don't want to go too big and kill the low end power.
Any and all advice appreciated.