Type 3's & Type 34's have a bolt on rear subframe, so you can unbolt and replace with another without changing the main pan, so you keep the original VIN.
I believe that that T34 and T3 are exactly the same chassis, and all years are interchangelable, but have never done it myself. A friend has put a late IRS subframe in his early Notch.
Only other issue is that early sub-frames has frame forks and a single point rear engine support, whereas later subframes had no frame forks and the engine used a rear engine support bar , so you would need this.
Keep us all posted!
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(o\ /o) '73 GT Beetle with 2.1 WBX (owned since 1990)
(o\ /o) '74 Jeans Beetle (owned since 1986)
(o\ /o) '67 Zenith Blue Beetle (needs lots of work..)
'02 Passat Sport Diseasel Estate ("Das Boot")
'05 Seat Leon FR, chipped (Mrs Moog's toy really...)
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