There isn't a way to identify a 4 bolt main block without looking inside the oil pan.
They're the same thing. What I mean is that the bearing lies between the axle and the hub, and the wheel is bolted to the hub. I don't know what this answer is this refers to axle bearings not motors...the best way to tell 2 bolt or 4 bolt main is to drop the pan as you know but for a less mechanically gifted individual or someone trying to avoid too much work try to find the casting number on the block and find a GM block search online and you should get it pretty easily.
There is no such thing as a "351 big block". ALL Ford 351's are considered small blocks, tho the wacked terminology of "351 big block" is mistakenly and continually repeated by the un-knowing and by many who should know better. Ford Motor Company considers ALL 351's small blocks; 351W, 351C, and 351M. Ford made a 352 big block (FE block like 360, 390, 406, 427, & 428). If that is what you meant, no the transmission bolt patterns are not the same. The 351W and 351C both have the same trans bolt pattern but the 351M has a bolt pattern like the 429 and 460.
There were three bell housing patterns I know of for the THM425.ChevPontiac/BuickMulti (Both)The correct answer to your question is in order: Yes, No, Yes
NASCAR uses many different engines. but in the sprint cup series. ALL SPRINT CUP CARS use carbourated Chevrolet 350 4-bolt main small block V-8s, bored out to 358. which is 5.7L. approx 800 horsepower.
on back side of block near oil filter it is a 17mm bolt or a torx bolt look like a star almost don't know size of torx bolt
Chevy does not cast the block size onto the block. once you see a big block compared small block you will know the difference. at a glance with nothing to compare it to id say look at the head. small block heads have one exhaust port close the ends and two exhaust ports real close together in the middle. the big blocks exhaust ports are evenly spaced and not close together at all. If it is a 350 or smaller it is a small block. If it is a 396 or larger it is a big block except for the 400 which was made in both small block and big block configuration.
Need to know what year.
It shouldn't matter.
I have a dodge 318 ci w/ block casting number-4387550-31824 i need to know what year this is
Engine block casting number
Need to know the year and engine size.
Yes it will set right in there if you know what your doing.