Im about to start a rebuild on my Aussie 302 clevo (soon to have 351 internals)and have been reading about oiling systems and the problems that the clevo has

Now before i send the block away to the machine shop is there anything i should/can do to improve it? I was going to deburr and remove any sharp edges any way but im sure theres more to be done

do i need to pay any special attention to the oil drain backs in the heads/valley, can they be enlarged?

what oil pump is best suited, i read that a HV pump just make things worse in regards to oil in the top end, is a high pressure pump the go?

are oil restrictors fine to use with a flat tappet cam?

would there be any gain in enlarging and blending the hole from the oil filter to the pump?

any advice would be great

Go to the store and buy a couple flats of beer, spend a few nights glued to your computer monitor, you are in for one education!

Thanks for the tip

Iv'e now gone from being unsure to being totally bloody confused

My understanding is that unless you are going to be running it past 6500-7000 a lot, and that you dont have a block that has worn lifter bores, build it stock, buy the (Nissan?) oil filter from Purolator that Dan Jones reccomends, shim the oil pressure relief spring on a standard pump and enjoy it.

My 2 pence..

"The usual Ford oil filter has a bypass valve bult into the filter which can allow unfiltered oil to bypass the filter, and the bypass can also fail causing a loss of oil pressure. Consider using Purolator L30119, it's a full size replacement for the FL-1A Ford/PH8A Fram filter. It has no bypass spring in the middle but it does have the rubber flapper for anti-drainback. The original application is for a 1978 Nissan 510 L20B engine which had the bypass valve in the engine block. The Purolator L30119 cross-references to; Fram PH2850, Motorcraft FL-181 and Wix 51452, however these filters have not been verified and may still have the bypass. It appears after 1978 Nissan went to a half height filter, Purolator L22167 fits that application and does not have the bypass spring but does have the rubber flapper for anti-drainback."
~ Dan Jones

from http://www.mustangsandmore.com/ubb/351Ctips.html (edited)



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