|11-15-2012 06:48 PM|
Then a coolant return hole has to be made in the front of the head for fittings to bring coolant to a collector box you'll have to fabricate or make by modifying a catalog item similar to what you need but not quite right. On the back of the heads is located a vent hole this needs to be either plugged or exploited with a fitting that can feed the heater bypass circuit.
You will need to purchase a carb style LT1/4 intake this is a GMPP kit that isn't too cheap, it's made to modify the LT1/4 from EFI to carb with a conventional distributor so it includes some stuff you don't need to terminate the Opti-Spark system of these engines.
Over the years I've done a few of these and in fact run a conversion on my S15. There really isn't a foolproof and inexpensive way of rerouting coolant to return via a conventional Gen I manifold. To do this still requires the plugging, drilling and milling on the gasket deck plus adds drilling into the forward cooling jacket and welding in a passage to route cooling to the manifold face that doesn't leak into the oily parts and at the same time provides a top end head oil return, so this adds a lot of complication and cost to the simpler way I discussed above.
I'd recommend you either sell these heads to a collector or buy the bottom end that fits them. However, I so love the LT1/4 that I recommend you sell the heads rather than buy a short block that fits them. This engine is a difficult and unique aberration on the SBC that is expensive to maintain and is really unconventional at most every problem it tried to solve. It's just a PIA unless you're really into these things and have the time and/or money it takes to mess around with them.
|11-15-2012 06:26 PM|
|techinspector1||I've read just enough about this swap to know that I don't want any part of it. Get a used Gen III LS motor and let 'er rip......or get the block and the rest of the LT parts and make a whole Gen II motor.|
|11-15-2012 05:47 PM|
|11-15-2012 05:36 PM|
Small block 350 Chevy
I have a set of LT1 Small block Heads the casting # tells me they are from a 1992 to 1997 LT1 Gen 2, I would like to use them on a 1979 350 Small block Z 28 Engine. I notice that the cooling ports are different
Will these heads work and what do I need to do?