First off, the name is MASTODON. Mastodon4x4 or mastodon motor company. 2nd yes he is correct. Find a nice 460 or 461 platform to build off of. 230-240-250-280-300 doesn't matter if you're going to do a transplant. 606 is great. Newer rebuilt 603 is great. 617a is great. Hell 5.3 LS is great. 24...