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Author Topic: Intake manifold mixing and matching  (Read 3050 times)
David Claflin
Big Block
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Posts: 7907

Location: Redneck Riviera (Ft Walton Beach Florida)

« on: April 28, 2018, 10:30:35 am »

I'd always heard the Vic 5.0 EFI had the best lower of any of the long runner EFI offerings, but the upper sucked. Similarly I'd heard the RPM II upper was decent, but the lower wasn't so great. I was thinking how feasible it would be to mate the VIC lower with the RPMII upper. I'm sure the upper would have to be ported to match, and there would have to be fittings welded on to allow securing the two halves together. I know the Holley SMII is the preferred one, and easier, but thinking these two together might be solid also. Thoughts?
VIC EFI gasket

RPM II gasket

1990 Red LX, 306, 80MM, ported gt40's, ported explorer upper accufab longtubes, 3" exhaust, 4.30's, 336/331
1985 LTD LX 347, 205 11R's, TFS-R, 90MMTB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
Big Block
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Posts: 2466

Location: Knoxville, TN.

« Reply #1 on: April 28, 2018, 06:05:32 pm »

Interesting, I own the RPM II for my 347, and a lower Victor 5.0 I want to sell.

If I make time, maybe I can find the Victor 5.0 and compare them. I liked the Victor 5.0 as you point out others say is great, but I needed the lowest intake to mount an intercooler above. I got a TFS R lower for that recently, the ports look to be a hair bigger than the Victor 5.0 lower.

If you don't have a line on the lower, I'd like $150 for this one, it came from the Corral forum.


1991 Mark VII LSC Special Edition, soon to be OBDII and 4R70W, then GTC body kit and 347.
1998 Mountaineer, plans for A4WD and KB 2200 blower later, XP8 parts, paint and a 332.
1973 Ranchero and 72 Sport front end ...will be a 351 Clevor, EFI and 4R70W.
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