8banger

Got a 78' 302 block and was wondering if its a decent usable block for a 347 kit...Block was free and looks very machinable.Standard Bore out of a 80k vech. Any thing I should look for as far as Known problems with these?Also anything out of the ordinary about this block that wont except certain other late 302 parts?Thanks

mjr46

send a PM to woodsy, he'll be able to fully and accurately answer the question

Modular_Madness96

Those are good blocks.Still had the thick wall casting.That means about 15 lbs of meat extra in the mains than the later blocks.

Only drawback is it isnt a roller motor but thats only a conversion away.

wrenchturner75

only thing i can think of is the block you have is meant for a 2 pce rear main seal, whereas the later 5.0 block is a one piece seal block, just something to remember. good luck

wrenchturner75

oh and the main cap that holds the old fashioned rope seal has a small pin that MUST be removed before installing the new rear main seal or it will fail in short order! ask me how i know? ahh good times.

Portmaster

If you plan on using factory style Hyd roller lifters, etc you maybe better off spending a 100 dollars or less on a rebuildable roller block for a mild 347. Roller conversoins are expensive. In the grand scheme of things it will save you some money to be able to reuse much of what you have. Just a thought

symonds86

yea im using a 68 mexican block on my 347 build, the converstion lifters are 400 alone

8banger

Thanks everyone...I was planning on a nice high rev (take advantge of those canfields 195's) solid cam instead of a hydr roller anyway(anything I should know about this before hand,problems?...runnning oil restrictors?etc.......Again thanks...

symonds86

those are the heads im planning on running, i know a guy who had some work done to a set and they were very impressive