I would look at the Holley EFI. Here is a very good read.
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EFI for everyone - Offshoreonly.com

I saw these and was my first choice but you know how we are 😂 ……We need to complicate and spend more $$$$ for 1bhp

you have a picture of yours ?

I just picked up the manifold that Smitty was talking about for my Holley EFI engines. And spent my Saturday morning talking with him about the performance. I'll be switching to these from Cutler/Holley Multi-Port single plane intakes.

I am going to 3D print an adapter flange to get the TB and arrestor away from the thermostat housing. And then I'll have JimV (Valako) blend the inner area of the intake.

Rookies got a good pic of the rect version, Ive used both the oval port and rectangle. Heres a brief summary of my testing on 3 different ones on 3 different engines, these are approximate numbers (dont have time ATM to go back and find exact numbers) but close so youll get the idea:
engine one was a 509, AFR 300 ovals, Bob M cam. Cam was in the 238/242 @.050 range. Intake was ported to match the tb and runners. Testing the 90 mm E tb we found even though it was claimed to flow 1150 or so, it flowed less then a 1000 out of box.
on my dyno engine had great BSFCS for being just over 9-1, on 89 octane made in excess of 680 hp on its best pull in dyno trim w headers w mufflers using J607, torqye wasnt as fabulose as the Hp, our goal was 650/650, instead we saw around 620 tq and 680+ hp. In boat there was barely no room for even a short cone filter directly on the TB so we used a 90 dgree elbow, it killed the power, boat was a heavy ass turd that was water logged (29 ft envision) so it was far from a rockstar
engine 2 was a 515 short block from Ron Sporl, customer bought it done from him vs having me build one to speed things up. Another set of AFR 300 CNC ovals, compression approx 9.3-1 if I remember right. My Dyno partner Norm also modded the 90 mm TB like first one, thinned shaft, cut down leading a and trailing edge of blade, ground out the drivability bump they put in for throttle response on the street. We did further testing and found that a 20$ Spectre transition piece/ volute going from 4.5 to 6' greatly enhanced the flow of tb on flow bench, talking sub 1000 box stock, just under 1200 moded and over 1500 w volute. I also bought just about every clamp on 4/4.5" cone filter and 6" cone filter that I could lay my hands on. Custom Cam from Bob M again, we focused on building more cylinder pressure/tq with a little less yet duration and moving intake Cl, etc. cam was like a 236/240 or so. om 89 octane on the dyno it made around 650 hp w no air horn, dropped to 620 give or take with short 4" clamp on cones, similar results we saw on flow bench and we had tested a 90 on flow bench which knocked flow off face of earth too. When i put the volute on, and retuned for it, got power back in the 680 hp range. Tried various 6" cones, found that a used KN 6" gave it virtually no hp drop. Thats all great BUT in the boat the volute hit the thermostat housing and there was no way possible to use the big KN either so that goes back to the importance of what goes in the front of these intakes. 90's absolutely kill the flow NA and hp, the wrong size and transition cone filter kills them too. They really want that volute and a very large KN staraight out front. On singles it hits the back seat.
3rd engine was a hot rod build 454 stroked to 496, afr 305s, large cam that was inappropriate for any inboard boat, just shy of 11-1 compression. Again, in round numbers it made around 675 hp with a VIC JR and modded holley 4150 that flowed around a 1000 CFM, tq was in the 610/620 range (DISMAL). We tested a rec port proflow on it w modded tb/volute, a cobbed up Mefi3 harness and ecm, made about 50 MORE hp and a tiny bit more tq. Weve never made the tq we expected from one BUT have exceeded the hp that even my dyno sim shows which rarely happens, FWIW, Smitty

Rookie, m using a desk top computer so I dont have access to my pics w/o alot of BS but post up the TB pics I sent you, Smitty

I just dynoed one of my engines with pro flow xt intake 92mm throttle body with smart coils. Was the first time using Holley efi very user friendly and the system worked great. Still working the tune but it did make 660hp at 5900rpm and 630 lbft of torque.

I have the spectre volute have not tried it yet will be getting that on the dyno session.

Per Smitty's request...