GMC 270 - talking to machine shops

pfarber · Post by **pfarber** » Mon Jun 19, 2006 3:18 pm

I need to give the machine shop a 'newer' reference for parts for the GMC 270.

They all balk when I say 1943 GMC CCKW.

What 'modern' vehicle reference can I give them for parts (mainly the top end/valve train) that is correct for the 270s in the CCKW's?

Thanks.

dr deuce · Post by **dr deuce** » Tue Jun 20, 2006 8:35 pm

There are differences in the WW2 and 50-60's 270 engines that 'may' include the valves. I know the pistons, heads, and intake manifolds are different. I do not know if the valves themselves are different.

I had one of my WW2 heads machined to take the chev 350 valves as recommended by Reg Hodgson in Army Motors ~1991. My machine shop (a racing shop) had no problem doing that.

pfarber · Post by **pfarber** » Wed Jun 21, 2006 5:33 pm

One of my local NAPA shops know how to look stuff up... basically they are listing all internal 270 parts that cover 41-56. I didn't ask for availability, but the part was listed as factory order.

Some good news.

timpage · Post by **timpage** » Sun Nov 26, 2006 12:41 pm

Did you ever find out how readily available early 270 engine parts are?