Engine SwapEverything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.
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so if im dropping in a 350 would i have to drop in a 2 bolt main engine? or could i drop in a 4 bolt main in?
The amount of bolts on the main caps doesn't matter when it comes to engine swaps. A 2 bolt and 4 bolt block could not be differentiated from unless the oil pan was off or they ran the numbers, and even some casting numbers cover both 2 and 4. 2 or 4 bolt main refers to the quantity of bolts that hold each main cap to the block. There is a benefit of 4 bolt main at higher power outputs but for the average engine 2 bolts works fine.
As someone else mentioned you can convert a 2 bolt block to a 4 bolt if need be and I believe they have more strength because the outer bolts are installed at an angle.
Long story short, don't let the quantity of main cap bolts deter you from an engine swap.
No they aren't, unless an aftermarket block or main caps are used, and aftermarket main caps with the angled outer bolts can't be used on stock 4-bolt main blocks.
No they aren't, unless an aftermarket block or main caps are used, and aftermarket main caps with the angled outer bolts can't be used on stock 4-bolt main blocks.
Thats what I was talking about by referencing your original post.
