[help needed] Speedmaster 8-Stack

Tuning, troubleshooting and the nitty gritty of using rusEFI to make your engine run nicely!
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rmfolsom@gmail.com
Posts: 1
Joined: Sun Jan 25, 2026 2:33 pm

Speedmaster 8-Stack

Post by rmfolsom@gmail.com »

I have a GT40 replica (RCR40) with a Prestige Motors 302 stroked to 363 with 530 HP. Currently running a four barrel carb and pump gas. Going to install an 8-stack from Speedmaster. It has eight Individual Throttle Bodies (ITB) with high impedance injectors. The idle control valve is servo activated and it has a MAF sensor. I am hoping to use a Holly’s dual sync, EFI distributor with an MSD ignition box. Otherwise it’s mostly 1965 technology.

My question is, which of the RusEFI boards is suited for a car like this. If I understand the product descriptions correctly, the USEFI should work. Thx in advance.
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