Seafoamed for the first time today...question

[ozone]

I ran seafoam through my brake booster line for the first time today. Followed instructions that I found on here (thanks guys). Engine seemed like it was a lot more responsive and smooth sounding. Now for the questions.
I had a mechanic tell me that if you run seafoam through the brake booster line it only ends up in the first bank of cylinders, is this true? Is there any proof one way or the other? How would I get it into the other banks if this is true?
So far I have changed plugs,
replaced pcv valve,
cleaned the MAF,
cleaned the throttle body/intake with deep creep,
degreased engine compartment.

What other low dollar improvements/replacement parts should I look into next?
1993 Ford Ranger XLT 4.0 4X4

once again, thanks for the help, I had never even heard of Seafoam before this.

ozone11@cinci.rr.com

 

[BrooklynBay]

It should go through everything. Replace are the spark plug cables, fuel filter, air filter, oil filter, transmission filter, and all the fluids. Clean the IAC, and the injectors.

 

[Jason94sport]

I heard the brake booster only gets the back cylinders.
If I run it I use the vacuum line directly under the TB.

 

[Bwana Bob]

I use the vacuum hose at the front of the engine, the one that attaches to the charcoal canister purge solenoid valve. Be careful when you disconnect the hose from the solenoid, the plastic fitting is brittle and can break if you're careless.

Bob