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1966chevy · 11-21-2012, 03:55 PM

Yes, for the C5 LS1 (years 1999-2004) they bolt right up using a 700R4, 350 or 400, different fly wheel. If you get a newer motor you might want to use the transmission that comes with that year or an adaptor plate could be used, more reseach required. For some reason, the LS1 motor is and about 2 inches shorter that the original motor. Using the same bolt pattern on the frame for engine mounts. The transmission mount had to be redrilled and was moved on the frame, the drive line had to be lengthened also.

11-21-2012, 03:55 PM	#3
1966chevy Registered User Join Date: Oct 2011 Location: San Jose, Ca Posts: 459	Re: 1966 chevy truck engine swap to LS1 Yes, for the C5 LS1 (years 1999-2004) they bolt right up using a 700R4, 350 or 400, different fly wheel. If you get a newer motor you might want to use the transmission that comes with that year or an adaptor plate could be used, more reseach required. For some reason, the LS1 motor is and about 2 inches shorter that the original motor. Using the same bolt pattern on the frame for engine mounts. The transmission mount had to be redrilled and was moved on the frame, the drive line had to be lengthened also.