That’s perfect! I think we all learned something. Mine are not armasteel. Not that it matters it will be a stroker but a driver, might burn off some tires but no drag racing(unless there’s a ford at the traffic light) and won’t turn a bunch of RPM. Just wondered the differenceThe arms steel caps do have arma steel cast into them on the top. Here are some pictures the top is non arma steel and the lower is arma steel. Also notice the bolts for arma steel are shouldered by the head and the others are straight. Hope this helps.View attachment 79698View attachment 79699View attachment 79700
The arms steel caps do have arma steel cast into them on the top. Here are some pictures the top is non arma steel and the lower is arma steel. Also notice the bolts for arma steel are shouldered by the head and the others are straight. Hope this helps.View attachment 79698View attachment 79699View attachment 79700[/QUOTE
Yup they do but some are hard to read it on them. Phil here are the pictures of the blocks. Don’t see much difference in the register on the block but you can see the main webbing difference. The first picture is a late 58 348 and the second is a 65 car 409.I never noticed the caps having ArmaSteel on them before, after viewing your post I went out into the garage and looked at my QA block and sure enough it says ArmaSteel. My block is a 63 engine with the X on the front so it should be pretty easy to tell if an engine block has ArmaSteel main caps.
Phil here are some more pictures of the cap and blockTake another picture of where the cap fits the block and post it.
The middle picture also shows the differences in the sides straight up and down for the early ones and the tapered sides for the armasteel caps,while the notched register kind of hides it the armasteel cap does have a wider footprint on the block which will help stability of the cap.It kind of shows the beginning of the train of thought that resulted in the BBC and sbc 400 2 bolt main cap.The arms steel caps do have arma steel cast into them on the top. Here are some pictures the top is non arma steel and the lower is arma steel. Also notice the bolts for arma steel are shouldered by the head and the others are straight. Hope this helps.View attachment 79698View attachment 79699View attachment 79700