Hello everyone, second kick at the can with a naturally aspirated 225 build. First candidate was too far gone, so added a little more to the empire of dirt to gain a better starting position. Just a question regarding identification, pictures included below, uncertain of the year range this five freeze plug block was produced. I took a look at the identification chart and playing with blocks page and could not ascertain its year range based on what markings are present on the block. Present on the driver (waterpump) side of the block is "330 4" then to the right of this "1 74 83", VIN plate located behind the alternator on the passenger side of the block is wiped clean, nothing visible there.

Block photos:
https://www.flickr.com/photos/204105057 ... ed-public/
https://www.flickr.com/photos/204105057 ... ed-public/

Additionally I have successfully identified the NP A833 I plan to mate to this block; problem being I do not have the associated bell housing to do so. Were the bellhousings used to mate RG 225's to A833's the same across the board regardless of car/truck application? This 833 Looks to be a aluminum based variant meant for truck use.

Transmission case:
https://www.flickr.com/photos/204105057 ... ed-public/

Thanks in advance for any knowledge that can be imparted here.

Welcome to the site and good luck with your projects!

I am not good with part numbers, but if you take some zoomed out pics of the block and BH from a few angles I can get you pretty close. Others will probably chime in based on your part numbers.

Where are you located? What kind of engine do you want to build? Stock, higher HP NA, boosted, EFI or induction?? Also, do you have a budget in mind?

Slant on,
Lou

Thanks for the info and pics. That is an 81-up engine based on the hydraulic valvetrain and head/block appearance. Should be a lightwt cast crank and block - great building stock.

I assume you mean the big threaded hole along the axis of the crank. That is 3/4" fine thread. Some engines did not have a bolt. Yours looks like it had one and someone removed it. You will want to engage/thread-in at least 3/4" of thread length. A bolt about 2" long should do it, but measure first. You'll need some big thick washers too, or stack up some grade 8 washers from the hardware store to have at least 1/4" washer thickness. You can turn the engine with that and will hurt nothing. You'll want to torque it to at least 100 ft-lbs and spec is probably something like 150 ft-lbs.

Sounds like a sensible build to me. It looks like people have had good luck with Holley TBI system with carter BBD carb bolt pattern, which will bolt to a Slant 6 2bbl intake. Generally I don't like the Holley stuff, but a couple of people have said that one works OK. The one bad thing I heard is the fuel pump with that system can go bad. You can also use an Offy 4bbl with 2bbl adapter plate. FITECH apparently not good, but I may be out of date.

Lou

They had 3 spds, I believe. However, if you have the BH from that 81-87 engine, it will be aluminum and it will have multiple bolt patterns that include one for the 833. I have a few of those BHs that I have used over the years. If you take a pick of the front face, I can 100% verify.

Lou

That BH will absolutely work. Good price too with the clutch linkage stuff.