What is required to take a 90's LT1 intake and put it on an 70's SB?
Converting an LT1 to Distributor?
- Thread starter BBShark
- Start date
Twin_Turbo
Der Maulwurf
- Joined
- Mar 5, 2008
- Messages
- 7,575
lt1 uses a different head bolt pattern too, you'll need to drill new holes. You need to saw a hole in the rear and weld on a dizzy mount (billets available on ebay) and then you have to drill & tap the manifold for coolant lines.
mrvette
Phantom of the Opera
Yup, and I did the 'brain' work necessary, while my TIG welder buddy who does that shit professionally, did the hard work....SNOT easy.....don't matter who you are....
but it's on the car running....and SO much simpler than any L98 setup....
LT1 intakes with FI rails can be had for less than 150 bux.....as I recall the naked intake was 75 and rails like 50....off ebay....
so I sat here and used a fresh gasket set to plot it all out, drill press, and then Harbor Freight for some Forstner bits....and so cut one down, reversing the cut, and PULLING it through the new holes to face the new bolt angle....from the head side of the gasket plane....
Then off to my welder buddy to redo the plot/cut offs from a old corroded carb mani....so to cut it all out, and TIG's in place...trick is, the OEM LT mani casting is very thin around the old dizzy cover place....and then you need have the LT mani EGR section cut out, I used a sawzall, so to clear the L98 dizzy.....so to fill the old EGR passages.....easy do, just like countless heat crossover risers in many manifolds over the decades....take PLASTER OF PARIS powder, mix it like thin drywall mud...pour into the passages, stop the flow through up near the induction/Throttle Body....I used duct tape...
let it set up good for a day or so....the moisture will cook itself out in time.....
I noted the rear cooling crossover on the L98 has a 1/4" ID line returning through the T/body and then to the suck side of the water pump.....so I followed suit...plumbed in with hoses on a T fitting, brought into the heater hose suck line....
made my own crossover....3/8 per side ID, and so TIG'd in place....
now on to the front outputs....the mani needs drilled, and some aluminum bungs TIG'd in place, so to hardware store for some brass ells, and a combo with copper plumbing sweated in place, after being screwed down, I have two 1/2" ID fittings from the front crossover ....feeding hoses to a remote thermostat housing....
I know this sounds like a LOT, but two things.....ONE, it is CHEEP, second is that I"m retarred, and enjoy the hell out of fucking around.....just for the tech challenge....
BTW, it was done many times before by others way before my project, it was them that gave me the encouragement/go ahead...
:hi::flash::yahoo::beer:
