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I've been doing searches on LS/VTEC lately and have gathered some info, but haven't had this question answered. If I built an LS/VTEC motor and a GSR motor with the same parts, would they be equal engines? Are the blocks identical?
b18c1 block has oil squirters for each cylinder. installing those into a b18a/b block would seem like a bitch. and a b18c1 block has a block girdle. of course the cranks/rods would be different.
of course the gsr would be better than the lsvtec. you wont have the reliability issues with the b18c1 as you would with an lsvtec. but i have seen some impressive dyno sheets of "stock" lsvtec's.