Some Speedsters vary with DTM fitment. It seems that since the cars are not built all exactly the same that even 2 cars from the same Mfr may be slightly different in the engine bay..
A good example is paul's car.. His engine fit perfectly with no trimming, while a recent Vintage convert had to trim under his decklid.. Another example was Simon's engine... He had to do a bit of trimming, but no one else that has converted a Chesil needed to, to my knowledge.
All my cooling systems are the same, built with the same jigs and assembled on top of the same fitting engine so they are all exact standardized replicas, so we know its not shroud variances that create the issues.
The shroud in the pic appears to be one of Joe Locicero's original DTM systems. These shrouds were not standardized and Joe built each one at a time as well as machining the castings for each, so all of them are different- this can cause some fitting issues.
The 2270 TIV is the best TIV engine that can be built, hands down for a daily driver/spirited performer. It is by far my most researched, most revised engine to date. The 2270 in it's various forms account for 85% of the engines that have my name on them.