anyone succesfully use su's with oem airbox on 620?

[Ricky116]

Ive been thinking about this forever. I have su's on my L18 in my 78 kingcab and I want to use an oem airbox but the booster is totally in the way so I have a early (73 I think) brake booster that is much smaller but theres still not enough room. Im thinking, well I can put smaller insulators in between the manifold and carbs but still need more room any suggestions or info on this? Thanks in advance Ricky

[Tristin]

Cut up the airbox. 

[wayno]

You will likely have to fabricate something like the 720 diesel engine filter assembly, or use 2 small flat/low profile filters.

I am using the OEM airbox(likely from a 510), that has been modified(made smaller), but I don't have a power brake booster in my 521 either.

What are you using now?

[Ricky116]

I haven't drove more than a 150 miles in the last 5 years so I have never put anything on just drove it without but now Im really close to having it 100% restored and will be driving it regularly.

[wayno]

It is easiest just to buy 2 low profile round filters and drive it till you see/find some better way.

[Ricky116]

I have some small KnN filters I just want to figure out how to make the blue oem style work. Im trying to build my truck in a manner that looks like truck came that way. :)