Does anyone know if the 250 style distributor will fit in a 235 - 261 engine?
It can be done, requires some modification. You can buy them converted.
There was a discussion about that on here but I can not find it. I know it is easier to put the old distributers in the newer engines but I don't remember why, I think the new ones are too short and the housing has to be turned to allow them to drop in a bit more so they reach the cam and oil pump.
I was wondering, seems the later models are less expensive and more plentiful. Al
I've seen several posts, out of curiosity, haven't done it myself. This link seems a little sparse on information. It would be nice to where to get the ring clamp. I imagine you find one at McMaster Carr. You will also need to remove your resistance wire/resistor and up the wire for power to the distributor to 12-10 awg. The HEI wants a full 12 volts.
http://www.stovebolt.com/techtips/hei_conversion.htmLarry
Just use the original 235 clamp, it works fine and gives you vacuum advance using the original hardware. If the distributor comes with vacuum advance, you can use a non-vac advance clamp from a GMC 270/302 distributor.
Also, the early S10 HEI's are the mini style that works well with a low resistance standard coil (pertronix 0.6 ohm Flame Thrower) mounted externally for a more original look.
Thanks for the info, I downloaded the link about the HEI distributor conversion, will start looking for one and try it. Interested to see how this works. As it has been said the article is a little sketchy and would be nice to have more info but it should be enough. Thanks again, hope more discussion will ensue. Happy Inlining. al
The use of a file sounds hokey to me. If you have access to a lathe, you can get professional results. Also, the tang engagement in the oil pump should be thought out using measurements from a 235 distributor. Also, pay attention to the cam (is it cast or steel billet?) as this will make a difference on whether you use a cast or steel distributor gear. If you aren't sure what your cam is, order a bronze gear from summit or jegs.
Some folks cut the shaft off and bore out the end leaving a 0.030 wall thickness or so. Then turn down the end of the original 235 distributor shaft to press fit into the bored HEI shaft at the gear location. Then drill through the assembled shafts at the gear pin location and assemble as a unit using locktite bearing mount adhesive.
Just checked out that website, Stovebolt.Com and it looks very interesting. Thanks Ken, I was thinking about this and have an extra distributor so that I can compare them, seems only prudent to have a stock one to look at and measure from. As soon as I can get my hands on an HEI will see what gives.