Yes. There are aftermarket suppliers that offer oil coolers that use the oil pan's drain plug as an access point. INTO?
Many of the 350's have an external oil cooler. It was standard equipment on pickups with the towing package, and in fact it was a bit of a problem for a few years since the engine oil coolant line often leaked when everything else was still tight.
Yep
No, Not even close.
Yes it will, if the 350 intake is from a pre-1987 engine.
No
Chevy 350
yes
yes
YES, It will fit right in it.
ya...its a sbc...they all interchange
Chevy did not have a 350 in 2001 engine options were 5.3, 6.0. or big block
No it will not. A Buick and a Chevy engine is not even close to being the same. Inpossible. SORRY
No. The 235 had a totally different bolt pattern.