turbo tree fiddy question

[85burbanator]

i just installed a 350 trans in my 88 and am having trouble coming up with a vacuum solution to the modulator. can i use a lenght of steel brake line in the proper size and then use some vacuum hose on the ends or should i use vacuum hose from the modulator up to the motor? also what should i tie the vacuum into? i took a th400 out of a fuel injected blazer once but cant remember what the line from the trans tied into.

 

[BobK]

Some 1/4" hard line should be fine.short piece of rubber line at each end.
Tie into manifold vacume.There is usually a spot at the rear of the intake for this.

 

[sweetk30]

i used 3/16 line on mine no problems. manifold vac .

 

[dremu]

i just installed a 350 trans in my 88 and am having trouble coming up with a vacuum solution to the modulator. can i use a lenght of steel brake line in the proper size and then use some vacuum hose on the ends or should i use vacuum hose from the modulator up to the motor? also what should i tie the vacuum into? i took a th400 out of a fuel injected blazer once but cant remember what the line from the trans tied into.

Use brakeline ... vacuum hose that long WILL expand and shrink and get hot and become an oily sticky melting mess by your exhaust manifold. Ask me why I know this ($&@^$&*@ing previous owner...)

-- A

 

[85burbanator]

so 1/4 inch steel brake line would be best then? were about on the manifold would the port be(is there one?) the one i took off on the blazer was at the back but if i remember correctly the po spliced it in to a vacuum line via a Y shaped splice and i cant recall were it all pluged in at.

 

[BobK]

Yes,1/4" or 3/16" hard line will be fine.
The vacume port is located back behind the carb,infront of the distributor,off to the passenger side just a little bit.
It's common to have a "Y" ot "T" fitting on there as that is where the A/C get's its vacume from(goes to vacume canister).