Its not the dog house thats in the way. Its the metal body structure under the wiper cowl. Posted this picture earlier. That bonnet is really sandwiched in there. Dumb on GMs part not to have just put a LT1 in these vans. Could have used a B-car engine, low mounted compressor and all. Then again I do not know why all these trucks did not get a TPI or a LT1 except that GM likes to cheap out and fall behind. The spider was trouble when they first came out with it in the 92 4.3L CPI and GM was well aware by 94 much less 95 they had problems with them. My uncle lemon lawed his 92 S10 Blazer because of the spider when it was new.
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Can you fit additional feeder ducts to the side of the cowl? Like auxiliary exhaust ports on a 2-stroke cylinder, either side of the main exhaust port.