brian_73Z

Thanks for the responses guys. Seems you all have quite a bit of knowledge in regards to these engines. I was considering several different ideas for my 73 240z rebuild/restore project including RB26DET, LS6 and 2JZ engine swaps. But I think I have decided to just keep it pretty much stock. I will go through the engine and maybe do some head work, put in a more aggresive cam and maybe larger valves, but thats about all. I am also planning to upgrade a few things like the distributer, ignition and things like that. Should be fun, but will probably take me awhile to get it all done. I finally have the car down to the shell and it will be going out to be soda blasted sometime in the next few weeks. I will start the engine teardown while the body is away getting worked on.

Ok, I know the differences between the l24, l26 and l28 engines when it comes to the bore and the stroke. But what I want to know is if there are any differences between the blocks themselves. My understanding is that the blocks before being bored and sleeved are all identical. In other words, I should be able to take a P30 and convert it to an F54 if I had access to a machine shop and money wasn't an option. Right? My second question assumes that the l24 to l28 conversion is possible and if it is then I should also be able to convert it to a 3.1L displacement like they do at Rebello Racing. I realize that the block may need to be resleeved to accomplish this, but I am just wondering if it is physically possible.