T4 exhaust dimension

[Wally]

Bert,
Just went out (it freezes here outside) and measured both exhausts:
The 1800 engine is approximately 645 mm between the (middle) bolt holes you mentioned. It is not a very accurate measurement mind you.
The 2000 engine (a CU example) is appr. 650 mm between the bolt holes (was easier to measure).
I hope that helps you a bit.

BTW I thought you had build a very nice type 1 engine with full flow and all?
Glad you are going to explore the type 4 :-)

Greetings,
Walter